Wine Cross Reference
wine/dlls/user32/win.c

   /*
    * Window related functions
    *
    * Copyright 1993, 1994 Alexandre Julliard
    *
    * This library is free software; you can redistribute it and/or
    * modify it under the terms of the GNU Lesser General Public
    * License as published by the Free Software Foundation; either
    * version 2.1 of the License, or (at your option) any later version.
   *
   * This library is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   * Lesser General Public License for more details.
   *
   * You should have received a copy of the GNU Lesser General Public
   * License along with this library; if not, write to the Free Software
   * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
   */
  
  #include "config.h"
  #include "wine/port.h"
  
  #include <assert.h>
  #include <stdarg.h>
  #include <stdlib.h>
  #include <string.h>
  #include "windef.h"
  #include "winbase.h"
  #include "wine/winbase16.h"
  #include "wine/winuser16.h"
  #include "wownt32.h"
  #include "wine/server.h"
  #include "wine/unicode.h"
  #include "win.h"
  #include "user_private.h"
  #include "controls.h"
  #include "winerror.h"
  #include "wine/debug.h"
  
  WINE_DEFAULT_DEBUG_CHANNEL(win);
  
  #define NB_USER_HANDLES  ((LAST_USER_HANDLE - FIRST_USER_HANDLE + 1) >> 1)
  #define USER_HANDLE_TO_INDEX(hwnd) ((LOWORD(hwnd) - FIRST_USER_HANDLE) >> 1)
  
  /**********************************************************************/
  
  /* helper for Get/SetWindowLong */
  static inline LONG_PTR get_win_data( const void *ptr, UINT size )
  {
      if (size == sizeof(WORD))
      {
          WORD ret;
          memcpy( &ret, ptr, sizeof(ret) );
          return ret;
      }
      else if (size == sizeof(DWORD))
      {
          DWORD ret;
          memcpy( &ret, ptr, sizeof(ret) );
          return ret;
      }
      else
      {
          LONG_PTR ret;
          memcpy( &ret, ptr, sizeof(ret) );
          return ret;
      }
  }
  
  /* helper for Get/SetWindowLong */
  static inline void set_win_data( void *ptr, LONG_PTR val, UINT size )
  {
      if (size == sizeof(WORD))
      {
          WORD newval = val;
          memcpy( ptr, &newval, sizeof(newval) );
      }
      else if (size == sizeof(DWORD))
      {
          DWORD newval = val;
          memcpy( ptr, &newval, sizeof(newval) );
      }
      else
      {
          memcpy( ptr, &val, sizeof(val) );
      }
  }
  
  
  static void *user_handles[NB_USER_HANDLES];
  
  /***********************************************************************
   *           create_window_handle
   *
   * Create a window handle with the server.
   */
  static WND *create_window_handle( HWND parent, HWND owner, LPCWSTR name,
                                    HINSTANCE instance, BOOL unicode )
 {
     WORD index;
     WND *win;
     HWND handle = 0, full_parent = 0, full_owner = 0;
     struct tagCLASS *class = NULL;
     int extra_bytes = 0;
 
     /* if 16-bit instance, map to module handle */
     if (instance && !HIWORD(instance))
         instance = HINSTANCE_32(GetExePtr(HINSTANCE_16(instance)));
 
     SERVER_START_REQ( create_window )
     {
         req->parent   = wine_server_user_handle( parent );
         req->owner    = wine_server_user_handle( owner );
         req->instance = wine_server_client_ptr( instance );
         if (!(req->atom = get_int_atom_value( name )) && name)
             wine_server_add_data( req, name, strlenW(name)*sizeof(WCHAR) );
         if (!wine_server_call_err( req ))
         {
             handle      = wine_server_ptr_handle( reply->handle );
             full_parent = wine_server_ptr_handle( reply->parent );
             full_owner  = wine_server_ptr_handle( reply->owner );
             extra_bytes = reply->extra;
             class       = wine_server_get_ptr( reply->class_ptr );
         }
     }
     SERVER_END_REQ;
 
     if (!handle)
     {
         WARN( "error %d creating window\n", GetLastError() );
         return NULL;
     }
 
     if (!(win = HeapAlloc( GetProcessHeap(), HEAP_ZERO_MEMORY,
                            sizeof(WND) + extra_bytes - sizeof(win->wExtra) )))
     {
         SERVER_START_REQ( destroy_window )
         {
             req->handle = wine_server_user_handle( handle );
             wine_server_call( req );
         }
         SERVER_END_REQ;
         SetLastError( ERROR_NOT_ENOUGH_MEMORY );
         return NULL;
     }
 
     if (!parent)  /* if parent is 0 we don't have a desktop window yet */
     {
         struct user_thread_info *thread_info = get_user_thread_info();
 
         if (name == (LPCWSTR)DESKTOP_CLASS_ATOM)
         {
             if (!thread_info->top_window) thread_info->top_window = full_parent ? full_parent : handle;
             else assert( full_parent == thread_info->top_window );
             if (full_parent && !USER_Driver->pCreateDesktopWindow( thread_info->top_window ))
                 ERR( "failed to create desktop window\n" );
         }
         else  /* HWND_MESSAGE parent */
         {
             if (!thread_info->msg_window && !full_parent) thread_info->msg_window = handle;
         }
     }
 
     USER_Lock();
 
     index = USER_HANDLE_TO_INDEX(handle);
     assert( index < NB_USER_HANDLES );
     user_handles[index] = win;
     win->hwndSelf   = handle;
     win->parent     = full_parent;
     win->owner      = full_owner;
     win->class      = class;
     win->winproc    = get_class_winproc( class );
     win->dwMagic    = WND_MAGIC;
     win->cbWndExtra = extra_bytes;
     if (WINPROC_IsUnicode( win->winproc, unicode )) win->flags |= WIN_ISUNICODE;
     return win;
 }
 
 
 /***********************************************************************
  *           free_window_handle
  *
  * Free a window handle.
  */
 static WND *free_window_handle( HWND hwnd )
 {
     WND *ptr;
     WORD index = USER_HANDLE_TO_INDEX(hwnd);
 
     if (index >= NB_USER_HANDLES) return NULL;
     USER_Lock();
     if ((ptr = user_handles[index]))
     {
         SERVER_START_REQ( destroy_window )
         {
             req->handle = wine_server_user_handle( hwnd );
             if (!wine_server_call_err( req ))
             {
                 user_handles[index] = NULL;
                 ptr->dwMagic = 0;
             }
             else
                 ptr = NULL;
         }
         SERVER_END_REQ;
     }
     USER_Unlock();
     HeapFree( GetProcessHeap(), 0, ptr );
     return ptr;
 }
 
 
 /*******************************************************************
  *           list_window_children
  *
  * Build an array of the children of a given window. The array must be
  * freed with HeapFree. Returns NULL when no windows are found.
  */
 static HWND *list_window_children( HDESK desktop, HWND hwnd, LPCWSTR class, DWORD tid )
 {
     HWND *list;
     int i, size = 128;
     ATOM atom = get_int_atom_value( class );
 
     /* empty class is not the same as NULL class */
     if (!atom && class && !class[0]) return NULL;
 
     for (;;)
     {
         int count = 0;
 
         if (!(list = HeapAlloc( GetProcessHeap(), 0, size * sizeof(HWND) ))) break;
 
         SERVER_START_REQ( get_window_children )
         {
             req->desktop = wine_server_obj_handle( desktop );
             req->parent = wine_server_user_handle( hwnd );
             req->tid = tid;
             req->atom = atom;
             if (!atom && class) wine_server_add_data( req, class, strlenW(class)*sizeof(WCHAR) );
             wine_server_set_reply( req, list, (size-1) * sizeof(user_handle_t) );
             if (!wine_server_call( req )) count = reply->count;
         }
         SERVER_END_REQ;
         if (count && count < size)
         {
             /* start from the end since HWND is potentially larger than user_handle_t */
             for (i = count - 1; i >= 0; i--)
                 list[i] = wine_server_ptr_handle( ((user_handle_t *)list)[i] );
             list[count] = 0;
             return list;
         }
         HeapFree( GetProcessHeap(), 0, list );
         if (!count) break;
         size = count + 1;  /* restart with a large enough buffer */
     }
     return NULL;
 }
 
 
 /*******************************************************************
  *           list_window_parents
  *
  * Build an array of all parents of a given window, starting with
  * the immediate parent. The array must be freed with HeapFree.
  */
 static HWND *list_window_parents( HWND hwnd )
 {
     WND *win;
     HWND current, *list;
     int i, pos = 0, size = 16, count = 0;
 
     if (!(list = HeapAlloc( GetProcessHeap(), 0, size * sizeof(HWND) ))) return NULL;
 
     current = hwnd;
     for (;;)
     {
         if (!(win = WIN_GetPtr( current ))) goto empty;
         if (win == WND_OTHER_PROCESS) break;  /* need to do it the hard way */
         if (win == WND_DESKTOP)
         {
             if (!pos) goto empty;
             list[pos] = 0;
             return list;
         }
         list[pos] = current = win->parent;
         WIN_ReleasePtr( win );
         if (!current) return list;
         if (++pos == size - 1)
         {
             /* need to grow the list */
             HWND *new_list = HeapReAlloc( GetProcessHeap(), 0, list, (size+16) * sizeof(HWND) );
             if (!new_list) goto empty;
             list = new_list;
             size += 16;
         }
     }
 
     /* at least one parent belongs to another process, have to query the server */
 
     for (;;)
     {
         count = 0;
         SERVER_START_REQ( get_window_parents )
         {
             req->handle = wine_server_user_handle( hwnd );
             wine_server_set_reply( req, list, (size-1) * sizeof(user_handle_t) );
             if (!wine_server_call( req )) count = reply->count;
         }
         SERVER_END_REQ;
         if (!count) goto empty;
         if (size > count)
         {
             /* start from the end since HWND is potentially larger than user_handle_t */
             for (i = count - 1; i >= 0; i--)
                 list[i] = wine_server_ptr_handle( ((user_handle_t *)list)[i] );
             list[count] = 0;
             return list;
         }
         HeapFree( GetProcessHeap(), 0, list );
         size = count + 1;
         if (!(list = HeapAlloc( GetProcessHeap(), 0, size * sizeof(HWND) ))) return NULL;
     }
 
  empty:
     HeapFree( GetProcessHeap(), 0, list );
     return NULL;
 }
 
 
 /*******************************************************************
  *           send_parent_notify
  */
 static void send_parent_notify( HWND hwnd, UINT msg )
 {
     if ((GetWindowLongW( hwnd, GWL_STYLE ) & (WS_CHILD | WS_POPUP)) == WS_CHILD &&
         !(GetWindowLongW( hwnd, GWL_EXSTYLE ) & WS_EX_NOPARENTNOTIFY))
     {
         HWND parent = GetParent(hwnd);
         if (parent && parent != GetDesktopWindow())
             SendMessageW( parent, WM_PARENTNOTIFY,
                           MAKEWPARAM( msg, GetWindowLongPtrW( hwnd, GWLP_ID )), (LPARAM)hwnd );
     }
 }
 
 
 /*******************************************************************
  *              get_server_window_text
  *
  * Retrieve the window text from the server.
  */
 static void get_server_window_text( HWND hwnd, LPWSTR text, INT count )
 {
     size_t len = 0;
 
     SERVER_START_REQ( get_window_text )
     {
         req->handle = wine_server_user_handle( hwnd );
         wine_server_set_reply( req, text, (count - 1) * sizeof(WCHAR) );
         if (!wine_server_call_err( req )) len = wine_server_reply_size(reply);
     }
     SERVER_END_REQ;
     text[len / sizeof(WCHAR)] = 0;
 }
 
 
 /*******************************************************************
  *           get_hwnd_message_parent
  *
  * Return the parent for HWND_MESSAGE windows.
  */
 HWND get_hwnd_message_parent(void)
 {
     struct user_thread_info *thread_info = get_user_thread_info();
 
     if (!thread_info->msg_window) GetDesktopWindow();  /* trigger creation */
     return thread_info->msg_window;
 }
 
 
 /*******************************************************************
  *           is_desktop_window
  *
  * Check if window is the desktop or the HWND_MESSAGE top parent.
  */
 BOOL is_desktop_window( HWND hwnd )
 {
     struct user_thread_info *thread_info = get_user_thread_info();
 
     if (!hwnd) return FALSE;
     if (hwnd == thread_info->top_window) return TRUE;
     if (hwnd == thread_info->msg_window) return TRUE;
 
     if (!HIWORD(hwnd) || HIWORD(hwnd) == 0xffff)
     {
         if (LOWORD(thread_info->top_window) == LOWORD(hwnd)) return TRUE;
         if (LOWORD(thread_info->msg_window) == LOWORD(hwnd)) return TRUE;
     }
     return FALSE;
 }
 
 
 /***********************************************************************
  *           WIN_GetPtr
  *
  * Return a pointer to the WND structure if local to the process,
  * or WND_OTHER_PROCESS if handle may be valid in other process.
  * If ret value is a valid pointer, it must be released with WIN_ReleasePtr.
  */
 WND *WIN_GetPtr( HWND hwnd )
 {
     WND * ptr;
     WORD index = USER_HANDLE_TO_INDEX(hwnd);
 
     if (index >= NB_USER_HANDLES) return NULL;
 
     USER_Lock();
     if ((ptr = user_handles[index]))
     {
         if (ptr->dwMagic == WND_MAGIC &&
             (hwnd == ptr->hwndSelf || !HIWORD(hwnd) || HIWORD(hwnd) == 0xffff))
             return ptr;
         ptr = NULL;
     }
     else if (is_desktop_window( hwnd )) ptr = WND_DESKTOP;
     else ptr = WND_OTHER_PROCESS;
     USER_Unlock();
     return ptr;
 }
 
 
 /***********************************************************************
  *           WIN_IsCurrentProcess
  *
  * Check whether a given window belongs to the current process (and return the full handle).
  */
 HWND WIN_IsCurrentProcess( HWND hwnd )
 {
     WND *ptr;
     HWND ret;
 
     if (!(ptr = WIN_GetPtr( hwnd )) || ptr == WND_OTHER_PROCESS || ptr == WND_DESKTOP) return 0;
     ret = ptr->hwndSelf;
     WIN_ReleasePtr( ptr );
     return ret;
 }
 
 
 /***********************************************************************
  *           WIN_IsCurrentThread
  *
  * Check whether a given window belongs to the current thread (and return the full handle).
  */
 HWND WIN_IsCurrentThread( HWND hwnd )
 {
     WND *ptr;
     HWND ret = 0;
 
     if (!(ptr = WIN_GetPtr( hwnd )) || ptr == WND_OTHER_PROCESS || ptr == WND_DESKTOP) return 0;
     if (ptr->tid == GetCurrentThreadId()) ret = ptr->hwndSelf;
     WIN_ReleasePtr( ptr );
     return ret;
 }
 
 
 /***********************************************************************
  *           WIN_Handle32
  *
  * Convert a 16-bit window handle to a full 32-bit handle.
  */
 HWND WIN_Handle32( HWND16 hwnd16 )
 {
     WND *ptr;
     HWND hwnd = (HWND)(ULONG_PTR)hwnd16;
 
     if (hwnd16 <= 1 || hwnd16 == 0xffff) return hwnd;
     /* do sign extension for -2 and -3 */
     if (hwnd16 >= (HWND16)-3) return (HWND)(LONG_PTR)(INT16)hwnd16;
 
     if (!(ptr = WIN_GetPtr( hwnd ))) return hwnd;
 
     if (ptr == WND_DESKTOP)
     {
         if (LOWORD(hwnd) == LOWORD(GetDesktopWindow())) return GetDesktopWindow();
         else return get_hwnd_message_parent();
     }
 
     if (ptr != WND_OTHER_PROCESS)
     {
         hwnd = ptr->hwndSelf;
         WIN_ReleasePtr( ptr );
     }
     else  /* may belong to another process */
     {
         SERVER_START_REQ( get_window_info )
         {
             req->handle = wine_server_user_handle( hwnd );
             if (!wine_server_call_err( req )) hwnd = wine_server_ptr_handle( reply->full_handle );
         }
         SERVER_END_REQ;
     }
     return hwnd;
 }
 
 
 /***********************************************************************
  *           WIN_SetOwner
  *
  * Change the owner of a window.
  */
 HWND WIN_SetOwner( HWND hwnd, HWND owner )
 {
     WND *win = WIN_GetPtr( hwnd );
     HWND ret = 0;
 
     if (!win || win == WND_DESKTOP) return 0;
     if (win == WND_OTHER_PROCESS)
     {
         if (IsWindow(hwnd)) ERR( "cannot set owner %p on other process window %p\n", owner, hwnd );
         return 0;
     }
     SERVER_START_REQ( set_window_owner )
     {
         req->handle = wine_server_user_handle( hwnd );
         req->owner  = wine_server_user_handle( owner );
         if (!wine_server_call( req ))
         {
             win->owner = wine_server_ptr_handle( reply->full_owner );
             ret = wine_server_ptr_handle( reply->prev_owner );
         }
     }
     SERVER_END_REQ;
     WIN_ReleasePtr( win );
     return ret;
 }
 
 
 /***********************************************************************
  *           WIN_SetStyle
  *
  * Change the style of a window.
  */
 ULONG WIN_SetStyle( HWND hwnd, ULONG set_bits, ULONG clear_bits )
 {
     BOOL ok;
     STYLESTRUCT style;
     WND *win = WIN_GetPtr( hwnd );
 
     if (!win || win == WND_DESKTOP) return 0;
     if (win == WND_OTHER_PROCESS)
     {
         if (IsWindow(hwnd))
             ERR( "cannot set style %x/%x on other process window %p\n",
                  set_bits, clear_bits, hwnd );
         return 0;
     }
     style.styleOld = win->dwStyle;
     style.styleNew = (win->dwStyle | set_bits) & ~clear_bits;
     if (style.styleNew == style.styleOld)
     {
         WIN_ReleasePtr( win );
         return style.styleNew;
     }
     SERVER_START_REQ( set_window_info )
     {
         req->handle = wine_server_user_handle( hwnd );
         req->flags  = SET_WIN_STYLE;
         req->style  = style.styleNew;
         req->extra_offset = -1;
         if ((ok = !wine_server_call( req )))
         {
             style.styleOld = reply->old_style;
             win->dwStyle = style.styleNew;
         }
     }
     SERVER_END_REQ;
     WIN_ReleasePtr( win );
     if (ok)
     {
         USER_Driver->pSetWindowStyle( hwnd, GWL_STYLE, &style );
         if ((style.styleOld ^ style.styleNew) & WS_VISIBLE) invalidate_dce( hwnd, NULL );
     }
     return style.styleOld;
 }
 
 
 /***********************************************************************
  *           WIN_GetRectangles
  *
  * Get the window and client rectangles.
  */
 BOOL WIN_GetRectangles( HWND hwnd, RECT *rectWindow, RECT *rectClient )
 {
     WND *win = WIN_GetPtr( hwnd );
     BOOL ret = TRUE;
 
     if (!win) return FALSE;
     if (win == WND_DESKTOP)
     {
         RECT rect;
         rect.left = rect.top = 0;
         if (hwnd == get_hwnd_message_parent())
         {
             rect.right  = 100;
             rect.bottom = 100;
         }
         else
         {
             rect.right  = GetSystemMetrics(SM_CXSCREEN);
             rect.bottom = GetSystemMetrics(SM_CYSCREEN);
         }
         if (rectWindow) *rectWindow = rect;
         if (rectClient) *rectClient = rect;
     }
     else if (win == WND_OTHER_PROCESS)
     {
         SERVER_START_REQ( get_window_rectangles )
         {
             req->handle = wine_server_user_handle( hwnd );
             if ((ret = !wine_server_call( req )))
             {
                 if (rectWindow)
                 {
                     rectWindow->left   = reply->window.left;
                     rectWindow->top    = reply->window.top;
                     rectWindow->right  = reply->window.right;
                     rectWindow->bottom = reply->window.bottom;
                 }
                 if (rectClient)
                 {
                     rectClient->left   = reply->client.left;
                     rectClient->top    = reply->client.top;
                     rectClient->right  = reply->client.right;
                     rectClient->bottom = reply->client.bottom;
                 }
             }
         }
         SERVER_END_REQ;
     }
     else
     {
         if (rectWindow) *rectWindow = win->rectWindow;
         if (rectClient) *rectClient = win->rectClient;
         WIN_ReleasePtr( win );
     }
     return ret;
 }
 
 
 /***********************************************************************
  *           WIN_DestroyWindow
  *
  * Destroy storage associated to a window. "Internals" p.358
  */
 LRESULT WIN_DestroyWindow( HWND hwnd )
 {
     WND *wndPtr;
     HWND *list;
     HMENU menu = 0, sys_menu;
     HWND icon_title;
 
     TRACE("%p\n", hwnd );
 
     /* free child windows */
     if ((list = WIN_ListChildren( hwnd )))
     {
         int i;
         for (i = 0; list[i]; i++)
         {
             if (WIN_IsCurrentThread( list[i] )) WIN_DestroyWindow( list[i] );
             else SendMessageW( list[i], WM_WINE_DESTROYWINDOW, 0, 0 );
         }
         HeapFree( GetProcessHeap(), 0, list );
     }
 
     /* Unlink now so we won't bother with the children later on */
     SERVER_START_REQ( set_parent )
     {
         req->handle = wine_server_user_handle( hwnd );
         req->parent = 0;
         wine_server_call( req );
     }
     SERVER_END_REQ;
 
     /*
      * Send the WM_NCDESTROY to the window being destroyed.
      */
     SendMessageW( hwnd, WM_NCDESTROY, 0, 0 );
 
     /* FIXME: do we need to fake QS_MOUSEMOVE wakebit? */
 
     /* free resources associated with the window */
 
     if (!(wndPtr = WIN_GetPtr( hwnd )) || wndPtr == WND_OTHER_PROCESS) return 0;
     if ((wndPtr->dwStyle & (WS_CHILD | WS_POPUP)) != WS_CHILD)
         menu = (HMENU)wndPtr->wIDmenu;
     sys_menu = wndPtr->hSysMenu;
     free_dce( wndPtr->dce, hwnd );
     wndPtr->dce = NULL;
     icon_title = wndPtr->icon_title;
     WIN_ReleasePtr( wndPtr );
 
     if (icon_title) DestroyWindow( icon_title );
     if (menu) DestroyMenu( menu );
     if (sys_menu) DestroyMenu( sys_menu );
 
     USER_Driver->pDestroyWindow( hwnd );
 
     free_window_handle( hwnd );
     return 0;
 }
 
 
 /***********************************************************************
  *              destroy_thread_window
  *
  * Destroy a window upon exit of its thread.
  */
 static void destroy_thread_window( HWND hwnd )
 {
     WND *wndPtr;
     HWND *list;
     HMENU menu = 0, sys_menu = 0;
     WORD index;
 
     /* free child windows */
 
     if ((list = WIN_ListChildren( hwnd )))
     {
         int i;
         for (i = 0; list[i]; i++)
         {
             if (WIN_IsCurrentThread( list[i] )) destroy_thread_window( list[i] );
             else SendMessageW( list[i], WM_WINE_DESTROYWINDOW, 0, 0 );
         }
         HeapFree( GetProcessHeap(), 0, list );
     }
 
     /* destroy the client-side storage */
 
     index = USER_HANDLE_TO_INDEX(hwnd);
     if (index >= NB_USER_HANDLES) return;
     USER_Lock();
     if ((wndPtr = user_handles[index]))
     {
         if ((wndPtr->dwStyle & (WS_CHILD | WS_POPUP)) != WS_CHILD) menu = (HMENU)wndPtr->wIDmenu;
         sys_menu = wndPtr->hSysMenu;
         free_dce( wndPtr->dce, hwnd );
         user_handles[index] = NULL;
         wndPtr->dwMagic = 0;
     }
     USER_Unlock();
 
     HeapFree( GetProcessHeap(), 0, wndPtr );
     if (menu) DestroyMenu( menu );
     if (sys_menu) DestroyMenu( sys_menu );
 }
 
 
 /***********************************************************************
  *              destroy_thread_child_windows
  *
  * Destroy child windows upon exit of its thread.
  */
 static void destroy_thread_child_windows( HWND hwnd )
 {
     HWND *list;
     int i;
 
     if (WIN_IsCurrentThread( hwnd ))
     {
         destroy_thread_window( hwnd );
     }
     else if ((list = WIN_ListChildren( hwnd )))
     {
         for (i = 0; list[i]; i++) destroy_thread_child_windows( list[i] );
         HeapFree( GetProcessHeap(), 0, list );
     }
 }
 
 
 /***********************************************************************
  *           WIN_DestroyThreadWindows
  *
  * Destroy all children of 'wnd' owned by the current thread.
  */
 void WIN_DestroyThreadWindows( HWND hwnd )
 {
     HWND *list;
     int i;
 
     if (!(list = WIN_ListChildren( hwnd ))) return;
 
     /* reset owners of top-level windows */
     for (i = 0; list[i]; i++)
     {
         if (!WIN_IsCurrentThread( list[i] ))
         {
             HWND owner = GetWindow( list[i], GW_OWNER );
             if (owner && WIN_IsCurrentThread( owner )) WIN_SetOwner( list[i], 0 );
         }
     }
 
     for (i = 0; list[i]; i++) destroy_thread_child_windows( list[i] );
     HeapFree( GetProcessHeap(), 0, list );
 }
 
 
 /***********************************************************************
  *           WIN_FixCoordinates
  *
  * Fix the coordinates - Helper for WIN_CreateWindowEx.
  * returns default show mode in sw.
  */
 static void WIN_FixCoordinates( CREATESTRUCTA *cs, INT *sw)
 {
 #define IS_DEFAULT(x)  ((x) == CW_USEDEFAULT || (x) == CW_USEDEFAULT16)
     POINT pos[2];
 
     if (cs->dwExStyle & WS_EX_MDICHILD)
     {
         UINT id = 0;
 
         MDI_CalcDefaultChildPos(cs->hwndParent, -1, pos, 0, &id);
         if (!(cs->style & WS_POPUP)) cs->hMenu = ULongToHandle(id);
 
         TRACE("MDI child id %04x\n", id);
     }
 
     if (cs->style & (WS_CHILD | WS_POPUP))
     {
         if (cs->dwExStyle & WS_EX_MDICHILD)
         {
             if (IS_DEFAULT(cs->x))
             {
                 cs->x = pos[0].x;
                 cs->y = pos[0].y;
             }
             if (IS_DEFAULT(cs->cx) || !cs->cx) cs->cx = pos[1].x;
             if (IS_DEFAULT(cs->cy) || !cs->cy) cs->cy = pos[1].y;
         }
         else
         {
             if (IS_DEFAULT(cs->x)) cs->x = cs->y = 0;
             if (IS_DEFAULT(cs->cx)) cs->cx = cs->cy = 0;
         }
     }
     else  /* overlapped window */
     {
         HMONITOR monitor;
         MONITORINFO mon_info;
         STARTUPINFOW info;
 
         if (!IS_DEFAULT(cs->x) && !IS_DEFAULT(cs->cx) && !IS_DEFAULT(cs->cy)) return;
 
         monitor = MonitorFromWindow( cs->hwndParent, MONITOR_DEFAULTTOPRIMARY );
         mon_info.cbSize = sizeof(mon_info);
         GetMonitorInfoW( monitor, &mon_info );
         GetStartupInfoW( &info );
 
         if (IS_DEFAULT(cs->x))
         {
             if (!IS_DEFAULT(cs->y)) *sw = cs->y;
             cs->x = (info.dwFlags & STARTF_USEPOSITION) ? info.dwX : mon_info.rcWork.left;
             cs->y = (info.dwFlags & STARTF_USEPOSITION) ? info.dwY : mon_info.rcWork.top;
         }
 
         if (IS_DEFAULT(cs->cx))
         {
             if (info.dwFlags & STARTF_USESIZE)
             {
                 cs->cx = info.dwXSize;
                 cs->cy = info.dwYSize;
             }
             else
             {
                 cs->cx = (mon_info.rcWork.right - mon_info.rcWork.left) * 3 / 4 - cs->x;
                 cs->cy = (mon_info.rcWork.bottom - mon_info.rcWork.top) * 3 / 4 - cs->y;
             }
         }
         /* neither x nor cx are default. Check the y values .
          * In the trace we see Outlook and Outlook Express using
          * cy set to CW_USEDEFAULT when opening the address book.
          */
         else if (IS_DEFAULT(cs->cy))
         {
             FIXME("Strange use of CW_USEDEFAULT in nHeight\n");
             cs->cy = (mon_info.rcWork.bottom - mon_info.rcWork.top) * 3 / 4 - cs->y;
         }
     }
 #undef IS_DEFAULT
 }
 
 /***********************************************************************
  *           dump_window_styles
  */
 static void dump_window_styles( DWORD style, DWORD exstyle )
 {
     TRACE( "style:" );
     if(style & WS_POPUP) TRACE(" WS_POPUP");
     if(style & WS_CHILD) TRACE(" WS_CHILD");
     if(style & WS_MINIMIZE) TRACE(" WS_MINIMIZE");
     if(style & WS_VISIBLE) TRACE(" WS_VISIBLE");
     if(style & WS_DISABLED) TRACE(" WS_DISABLED");
     if(style & WS_CLIPSIBLINGS) TRACE(" WS_CLIPSIBLINGS");
     if(style & WS_CLIPCHILDREN) TRACE(" WS_CLIPCHILDREN");
     if(style & WS_MAXIMIZE) TRACE(" WS_MAXIMIZE");
     if((style & WS_CAPTION) == WS_CAPTION) TRACE(" WS_CAPTION");
     else
     {
         if(style & WS_BORDER) TRACE(" WS_BORDER");
         if(style & WS_DLGFRAME) TRACE(" WS_DLGFRAME");
     }
     if(style & WS_VSCROLL) TRACE(" WS_VSCROLL");
     if(style & WS_HSCROLL) TRACE(" WS_HSCROLL");
     if(style & WS_SYSMENU) TRACE(" WS_SYSMENU");
     if(style & WS_THICKFRAME) TRACE(" WS_THICKFRAME");
     if (style & WS_CHILD)
     {
         if(style & WS_GROUP) TRACE(" WS_GROUP");
         if(style & WS_TABSTOP) TRACE(" WS_TABSTOP");
     }
     else
     {
         if(style & WS_MINIMIZEBOX) TRACE(" WS_MINIMIZEBOX");
         if(style & WS_MAXIMIZEBOX) TRACE(" WS_MAXIMIZEBOX");
     }
 
     /* FIXME: Add dumping of BS_/ES_/SBS_/LBS_/CBS_/DS_/etc. styles */
 #define DUMPED_STYLES \
     (WS_POPUP | \
      WS_CHILD | \
      WS_MINIMIZE | \
      WS_VISIBLE | \
      WS_DISABLED | \
      WS_CLIPSIBLINGS | \
      WS_CLIPCHILDREN | \
      WS_MAXIMIZE | \
      WS_BORDER | \
      WS_DLGFRAME | \
      WS_VSCROLL | \
      WS_HSCROLL | \
      WS_SYSMENU | \
      WS_THICKFRAME | \
      WS_GROUP | \
      WS_TABSTOP | \
      WS_MINIMIZEBOX | \
      WS_MAXIMIZEBOX)
 
     if(style & ~DUMPED_STYLES) TRACE(" %08lx", style & ~DUMPED_STYLES);
     TRACE("\n");
 #undef DUMPED_STYLES
 
     TRACE( "exstyle:" );
     if(exstyle & WS_EX_DLGMODALFRAME) TRACE(" WS_EX_DLGMODALFRAME");
     if(exstyle & WS_EX_DRAGDETECT) TRACE(" WS_EX_DRAGDETECT");
     if(exstyle & WS_EX_NOPARENTNOTIFY) TRACE(" WS_EX_NOPARENTNOTIFY");
     if(exstyle & WS_EX_TOPMOST) TRACE(" WS_EX_TOPMOST");
     if(exstyle & WS_EX_ACCEPTFILES) TRACE(" WS_EX_ACCEPTFILES");
     if(exstyle & WS_EX_TRANSPARENT) TRACE(" WS_EX_TRANSPARENT");
     if(exstyle & WS_EX_MDICHILD) TRACE(" WS_EX_MDICHILD");
     if(exstyle & WS_EX_TOOLWINDOW) TRACE(" WS_EX_TOOLWINDOW");
     if(exstyle & WS_EX_WINDOWEDGE) TRACE(" WS_EX_WINDOWEDGE");
     if(exstyle & WS_EX_CLIENTEDGE) TRACE(" WS_EX_CLIENTEDGE");
     if(exstyle & WS_EX_CONTEXTHELP) TRACE(" WS_EX_CONTEXTHELP");
     if(exstyle & WS_EX_RIGHT) TRACE(" WS_EX_RIGHT");
     if(exstyle & WS_EX_RTLREADING) TRACE(" WS_EX_RTLREADING");
     if(exstyle & WS_EX_LEFTSCROLLBAR) TRACE(" WS_EX_LEFTSCROLLBAR");
     if(exstyle & WS_EX_CONTROLPARENT) TRACE(" WS_EX_CONTROLPARENT");
     if(exstyle & WS_EX_STATICEDGE) TRACE(" WS_EX_STATICEDGE");
     if(exstyle & WS_EX_APPWINDOW) TRACE(" WS_EX_APPWINDOW");
     if(exstyle & WS_EX_LAYERED) TRACE(" WS_EX_LAYERED");
 
 #define DUMPED_EX_STYLES \
     (WS_EX_DLGMODALFRAME | \
      WS_EX_DRAGDETECT | \
      WS_EX_NOPARENTNOTIFY | \
      WS_EX_TOPMOST | \
      WS_EX_ACCEPTFILES | \
      WS_EX_TRANSPARENT | \
      WS_EX_MDICHILD | \
      WS_EX_TOOLWINDOW | \
      WS_EX_WINDOWEDGE | \
      WS_EX_CLIENTEDGE | \
      WS_EX_CONTEXTHELP | \
      WS_EX_RIGHT | \
      WS_EX_RTLREADING | \
      WS_EX_LEFTSCROLLBAR | \
      WS_EX_CONTROLPARENT | \
      WS_EX_STATICEDGE | \
      WS_EX_APPWINDOW | \
      WS_EX_LAYERED)
 
     if(exstyle & ~DUMPED_EX_STYLES) TRACE(" %08lx", exstyle & ~DUMPED_EX_STYLES);
     TRACE("\n");
 #undef DUMPED_EX_STYLES
 }
 
 
 /***********************************************************************
  *           WIN_CreateWindowEx
  *
  * Implementation of CreateWindowEx().
  */
 static HWND WIN_CreateWindowEx( CREATESTRUCTA *cs, LPCWSTR className, UINT flags )
 {
     INT cx, cy, style, sw = SW_SHOW;
     LRESULT result;
     RECT rect;
     WND *wndPtr;
     HWND hwnd, parent, owner, top_child = 0;
     BOOL unicode = (flags & WIN_ISUNICODE) != 0;
     MDICREATESTRUCTA mdi_cs;
     CBT_CREATEWNDA cbtc;
     CREATESTRUCTA cbcs;
 
     TRACE("%s %s ex=%08x style=%08x %d,%d %dx%d parent=%p menu=%p inst=%p params=%p\n",
           unicode ? debugstr_w((LPCWSTR)cs->lpszName) : debugstr_a(cs->lpszName),
           debugstr_w(className),
           cs->dwExStyle, cs->style, cs->x, cs->y, cs->cx, cs->cy,
           cs->hwndParent, cs->hMenu, cs->hInstance, cs->lpCreateParams );
     if(TRACE_ON(win)) dump_window_styles( cs->style, cs->dwExStyle );
 
     /* Fix the styles for MDI children */
     if (cs->dwExStyle & WS_EX_MDICHILD)
     {
         UINT flags = 0;
 
         wndPtr = WIN_GetPtr(cs->hwndParent);
         if (wndPtr && wndPtr != WND_OTHER_PROCESS && wndPtr != WND_DESKTOP)
         {
             flags = wndPtr->flags;
             WIN_ReleasePtr(wndPtr);
         }
 
         if (!(flags & WIN_ISMDICLIENT))
         {
             WARN("WS_EX_MDICHILD, but parent %p is not MDIClient\n", cs->hwndParent);
             return 0;
         }
 
         /* cs->lpCreateParams of WM_[NC]CREATE is different for MDI children.
          * MDICREATESTRUCT members have the originally passed values.
          *
          * Note: we rely on the fact that MDICREATESTRUCTA and MDICREATESTRUCTW
          * have the same layout.
          */
         mdi_cs.szClass = cs->lpszClass;
         mdi_cs.szTitle = cs->lpszName;
         mdi_cs.hOwner = cs->hInstance;
         mdi_cs.x = cs->x;
         mdi_cs.y = cs->y;
         mdi_cs.cx = cs->cx;
         mdi_cs.cy = cs->cy;
         mdi_cs.style = cs->style;
         mdi_cs.lParam = (LPARAM)cs->lpCreateParams;
 
         cs->lpCreateParams = &mdi_cs;
 
         if (GetWindowLongW(cs->hwndParent, GWL_STYLE) & MDIS_ALLCHILDSTYLES)
         {
             if (cs->style & WS_POPUP)
             {
                 TRACE("WS_POPUP with MDIS_ALLCHILDSTYLES is not allowed\n");
                 return 0;
             }
             cs->style |= WS_CHILD | WS_CLIPSIBLINGS;
         }
         else
         {
             cs->style &= ~WS_POPUP;
             cs->style |= WS_CHILD | WS_VISIBLE | WS_CLIPSIBLINGS | WS_CAPTION |
                 WS_SYSMENU | WS_THICKFRAME | WS_MINIMIZEBOX | WS_MAXIMIZEBOX;
         }
 
         top_child = GetWindow(cs->hwndParent, GW_CHILD);
 
         if (top_child)
         {
             /* Restore current maximized child */
             if((cs->style & WS_VISIBLE) && IsZoomed(top_child))
             {
                 TRACE("Restoring current maximized child %p\n", top_child);
                 SendMessageW( top_child, WM_SETREDRAW, FALSE, 0 );
                 ShowWindow( top_child, SW_SHOWNORMAL );
                 SendMessageW( top_child, WM_SETREDRAW, TRUE, 0 );
             }
         }
     }
 
     /* Find the parent window */
 
     parent = cs->hwndParent;
     owner = 0;
 
     if (cs->hwndParent == HWND_MESSAGE)
     {
         cs->hwndParent = parent = get_hwnd_message_parent();
     }
     else if (cs->hwndParent)
     {
         if ((cs->style & (WS_CHILD|WS_POPUP)) != WS_CHILD)
         {
             parent = GetDesktopWindow();
             owner = cs->hwndParent;
         }
     }
     else
     {
         static const WCHAR messageW[] = {'M','e','s','s','a','g','e',0};
 
         if ((cs->style & (WS_CHILD|WS_POPUP)) == WS_CHILD)
         {
             WARN("No parent for child window\n" );
             SetLastError(ERROR_TLW_WITH_WSCHILD);
             return 0;  /* WS_CHILD needs a parent, but WS_POPUP doesn't */
         }
         /* are we creating the desktop or HWND_MESSAGE parent itself? */
         if (className != (LPCWSTR)DESKTOP_CLASS_ATOM &&
             (IS_INTRESOURCE(className) || strcmpiW( className, messageW )))
             parent = GetDesktopWindow();
     }
 
     WIN_FixCoordinates(cs, &sw); /* fix default coordinates */
 
     if ((cs->dwExStyle & WS_EX_DLGMODALFRAME) ||
         ((!(cs->dwExStyle & WS_EX_STATICEDGE)) &&
           (cs->style & (WS_DLGFRAME | WS_THICKFRAME))))
         cs->dwExStyle |= WS_EX_WINDOWEDGE;
     else
         cs->dwExStyle &= ~WS_EX_WINDOWEDGE;
 
     /* Create the window structure */
 
     if (!(wndPtr = create_window_handle( parent, owner, className, cs->hInstance, unicode )))
         return 0;
     hwnd = wndPtr->hwndSelf;
 
     /* Fill the window structure */
 
     wndPtr->tid            = GetCurrentThreadId();
     wndPtr->hInstance      = cs->hInstance;
     wndPtr->text           = NULL;
     wndPtr->dwStyle        = cs->style & ~WS_VISIBLE;
     wndPtr->dwExStyle      = cs->dwExStyle;
     wndPtr->wIDmenu        = 0;
     wndPtr->helpContext    = 0;
     wndPtr->pScroll        = NULL;
     wndPtr->userdata       = 0;
     wndPtr->hIcon          = 0;
     wndPtr->hIconSmall     = 0;
     wndPtr->hSysMenu       = 0;
     wndPtr->flags         |= (flags & WIN_ISWIN32);
 
     wndPtr->min_pos.x = wndPtr->min_pos.y = -1;
     wndPtr->max_pos.x = wndPtr->max_pos.y = -1;
 
     if (wndPtr->dwStyle & WS_SYSMENU) SetSystemMenu( hwnd, 0 );
 
     /*
      * Correct the window styles.
      *
      * It affects only the style loaded into the WIN structure.
      */
 
     if ((wndPtr->dwStyle & (WS_CHILD | WS_POPUP)) != WS_CHILD)
     {
         wndPtr->dwStyle |= WS_CLIPSIBLINGS;
         if (!(wndPtr->dwStyle & WS_POPUP))
             wndPtr->dwStyle |= WS_CAPTION;
     }
 
     /*
      * WS_EX_WINDOWEDGE appears to be enforced based on the other styles, so
      * why does the user get to set it?
      */
 
     if ((wndPtr->dwExStyle & WS_EX_DLGMODALFRAME) ||
           (wndPtr->dwStyle & (WS_DLGFRAME | WS_THICKFRAME)))
         wndPtr->dwExStyle |= WS_EX_WINDOWEDGE;
     else
         wndPtr->dwExStyle &= ~WS_EX_WINDOWEDGE;
 
     if (!(wndPtr->dwStyle & (WS_CHILD | WS_POPUP)))
         wndPtr->flags |= WIN_NEED_SIZE;
 
     SERVER_START_REQ( set_window_info )
     {
         req->handle    = wine_server_user_handle( hwnd );
         req->flags     = SET_WIN_STYLE | SET_WIN_EXSTYLE | SET_WIN_INSTANCE | SET_WIN_UNICODE;
         req->style     = wndPtr->dwStyle;
         req->ex_style  = wndPtr->dwExStyle;
         req->instance  = wine_server_client_ptr( wndPtr->hInstance );
         req->is_unicode = (wndPtr->flags & WIN_ISUNICODE) != 0;
         req->extra_offset = -1;
         wine_server_call( req );
     }
     SERVER_END_REQ;
 
     /* Set the window menu */
 
     if ((wndPtr->dwStyle & (WS_CHILD | WS_POPUP)) != WS_CHILD)
     {
         if (cs->hMenu)
         {
             if (!MENU_SetMenu(hwnd, cs->hMenu))
             {
                 WIN_ReleasePtr( wndPtr );
                 free_window_handle( hwnd );
                 return 0;
             }
         }
         else
         {
             LPCSTR menuName = (LPCSTR)GetClassLongPtrA( hwnd, GCLP_MENUNAME );
             if (menuName)
             {
                 if (!cs->hInstance || HIWORD(cs->hInstance))
                     cs->hMenu = LoadMenuA(cs->hInstance,menuName);
                 else
                     cs->hMenu = HMENU_32(LoadMenu16(HINSTANCE_16(cs->hInstance),menuName));
 
                 if (cs->hMenu) MENU_SetMenu( hwnd, cs->hMenu );
             }
         }
     }
     else SetWindowLongPtrW( hwnd, GWLP_ID, (ULONG_PTR)cs->hMenu );
 
     /* call the WH_CBT hook */
 
     /* the window style passed to the hook must be the real window style,
      * rather than just the window style that the caller to CreateWindowEx
      * passed in, so we have to copy the original CREATESTRUCT and get the
      * the real style. */
     cbcs = *cs;
     cbcs.style = wndPtr->dwStyle;
     cbtc.lpcs = &cbcs;
     cbtc.hwndInsertAfter = HWND_TOP;
     WIN_ReleasePtr( wndPtr );
     if (HOOK_CallHooks( WH_CBT, HCBT_CREATEWND, (WPARAM)hwnd, (LPARAM)&cbtc, unicode )) goto failed;
 
     /* send the WM_GETMINMAXINFO message and fix the size if needed */
 
     cx = cs->cx;
     cy = cs->cy;
     if ((cs->style & WS_THICKFRAME) || !(cs->style & (WS_POPUP | WS_CHILD)))
     {
         POINT maxSize, maxPos, minTrack, maxTrack;
         WINPOS_GetMinMaxInfo( hwnd, &maxSize, &maxPos, &minTrack, &maxTrack);
         if (maxTrack.x < cx) cx = maxTrack.x;
         if (maxTrack.y < cy) cy = maxTrack.y;
         if (minTrack.x > cx) cx = minTrack.x;
         if (minTrack.y > cy) cy = minTrack.y;
     }
 
     if (cx < 0) cx = 0;
     if (cy < 0) cy = 0;
     SetRect( &rect, cs->x, cs->y, cs->x + cx, cs->y + cy );
     /* check for wraparound */
     if (cs->x + cx < cs->x) rect.right = 0x7fffffff;
     if (cs->y + cy < cs->y) rect.bottom = 0x7fffffff;
     if (!set_window_pos( hwnd, 0, SWP_NOZORDER | SWP_NOACTIVATE, &rect, &rect, NULL )) goto failed;
 
     /* send WM_NCCREATE */
 
     TRACE( "hwnd %p cs %d,%d %dx%d\n", hwnd, cs->x, cs->y, cx, cy );
     if (unicode)
         result = SendMessageW( hwnd, WM_NCCREATE, 0, (LPARAM)cs );
     else
         result = SendMessageA( hwnd, WM_NCCREATE, 0, (LPARAM)cs );
     if (!result)
     {
         WARN( "%p: aborted by WM_NCCREATE\n", hwnd );
         goto failed;
     }
 
     /* send WM_NCCALCSIZE */
 
     if ((wndPtr = WIN_GetPtr(hwnd)))
     {
         /* yes, even if the CBT hook was called with HWND_TOP */
         POINT pt;
         HWND insert_after = (wndPtr->dwStyle & WS_CHILD) ? HWND_BOTTOM : HWND_TOP;
         RECT window_rect = wndPtr->rectWindow;
         RECT client_rect = window_rect;
         WIN_ReleasePtr( wndPtr );
 
         /* the rectangle is in screen coords for WM_NCCALCSIZE when wparam is FALSE */
         pt.x = pt.y = 0;
         MapWindowPoints( parent, 0, &pt, 1 );
         OffsetRect( &client_rect, pt.x, pt.y );
         SendMessageW( hwnd, WM_NCCALCSIZE, FALSE, (LPARAM)&client_rect );
         OffsetRect( &client_rect, -pt.x, -pt.y );
         set_window_pos( hwnd, insert_after, SWP_NOACTIVATE, &window_rect, &client_rect, NULL );
     }
     else return 0;
 
     /* send WM_CREATE */
 
     if (unicode)
         result = SendMessageW( hwnd, WM_CREATE, 0, (LPARAM)cs );
     else
         result = SendMessageA( hwnd, WM_CREATE, 0, (LPARAM)cs );
     if (result == -1) goto failed;
 
     /* call the driver */
 
     if (!USER_Driver->pCreateWindow( hwnd )) goto failed;
 
     NotifyWinEvent(EVENT_OBJECT_CREATE, hwnd, OBJID_WINDOW, 0);
 
     /* send the size messages */
 
     if (!(wndPtr = WIN_GetPtr( hwnd )) ||
           wndPtr == WND_OTHER_PROCESS || wndPtr == WND_DESKTOP) return 0;
     if (!(wndPtr->flags & WIN_NEED_SIZE))
     {
         rect = wndPtr->rectClient;
         WIN_ReleasePtr( wndPtr );
         SendMessageW( hwnd, WM_SIZE, SIZE_RESTORED,
                       MAKELONG(rect.right-rect.left, rect.bottom-rect.top));
         SendMessageW( hwnd, WM_MOVE, 0, MAKELONG( rect.left, rect.top ) );
     }
     else WIN_ReleasePtr( wndPtr );
 
     /* Show the window, maximizing or minimizing if needed */
 
     style = WIN_SetStyle( hwnd, 0, WS_MAXIMIZE | WS_MINIMIZE );
     if (style & (WS_MINIMIZE | WS_MAXIMIZE))
     {
         RECT newPos;
         UINT swFlag = (style & WS_MINIMIZE) ? SW_MINIMIZE : SW_MAXIMIZE;
 
         swFlag = WINPOS_MinMaximize( hwnd, swFlag, &newPos );
         swFlag |= SWP_FRAMECHANGED; /* Frame always gets changed */
         if (!(style & WS_VISIBLE) || (style & WS_CHILD) || GetActiveWindow()) swFlag |= SWP_NOACTIVATE;
         SetWindowPos( hwnd, 0, newPos.left, newPos.top, newPos.right - newPos.left,
                       newPos.bottom - newPos.top, swFlag );
     }
 
     /* Notify the parent window only */
 
     send_parent_notify( hwnd, WM_CREATE );
     if (!IsWindow( hwnd )) return 0;
 
     if (cs->style & WS_VISIBLE)
     {
         if (cs->style & WS_MAXIMIZE)
             sw = SW_SHOW;
         else if (cs->style & WS_MINIMIZE)
             sw = SW_SHOWMINIMIZED;
 
         ShowWindow( hwnd, sw );
         if (cs->dwExStyle & WS_EX_MDICHILD)
         {
             SendMessageW(cs->hwndParent, WM_MDIREFRESHMENU, 0, 0);
             /* ShowWindow won't activate child windows */
             SetWindowPos( hwnd, HWND_TOP, 0, 0, 0, 0, SWP_SHOWWINDOW | SWP_NOMOVE | SWP_NOSIZE );
         }
     }
 
     /* Call WH_SHELL hook */
 
     if (!(GetWindowLongW( hwnd, GWL_STYLE ) & WS_CHILD) && !GetWindow( hwnd, GW_OWNER ))
         HOOK_CallHooks( WH_SHELL, HSHELL_WINDOWCREATED, (WPARAM)hwnd, 0, TRUE );
 
     TRACE("created window %p\n", hwnd);
     return hwnd;
 
 failed:
     WIN_DestroyWindow( hwnd );
     return 0;
 }
 
 
 /***********************************************************************
  *              CreateWindow (USER.41)
  */
 HWND16 WINAPI CreateWindow16( LPCSTR className, LPCSTR windowName,
                               DWORD style, INT16 x, INT16 y, INT16 width,
                               INT16 height, HWND16 parent, HMENU16 menu,
                               HINSTANCE16 instance, LPVOID data )
 {
     return CreateWindowEx16( 0, className, windowName, style,
                              x, y, width, height, parent, menu, instance, data );
 }
 
 
 /***********************************************************************
  *              CreateWindowEx (USER.452)
  */
 HWND16 WINAPI CreateWindowEx16( DWORD exStyle, LPCSTR className,
                                 LPCSTR windowName, DWORD style, INT16 x,
                                 INT16 y, INT16 width, INT16 height,
                                 HWND16 parent, HMENU16 menu,
                                 HINSTANCE16 instance, LPVOID data )
 {
     CREATESTRUCTA cs;
     char buffer[256];
 
     /* Fix the coordinates */
 
     cs.x  = (x == CW_USEDEFAULT16) ? CW_USEDEFAULT : (INT)x;
     cs.y  = (y == CW_USEDEFAULT16) ? CW_USEDEFAULT : (INT)y;
     cs.cx = (width == CW_USEDEFAULT16) ? CW_USEDEFAULT : (INT)width;
     cs.cy = (height == CW_USEDEFAULT16) ? CW_USEDEFAULT : (INT)height;
 
     /* Create the window */
 
     cs.lpCreateParams = data;
     cs.hInstance      = HINSTANCE_32(instance);
     cs.hMenu          = HMENU_32(menu);
     cs.hwndParent     = WIN_Handle32( parent );
     cs.style          = style;
     cs.lpszName       = windowName;
     cs.lpszClass      = className;
     cs.dwExStyle      = exStyle;
 
     if (!IS_INTRESOURCE(className))
     {
         WCHAR bufferW[256];
 
         if (!MultiByteToWideChar( CP_ACP, 0, className, -1, bufferW, sizeof(bufferW)/sizeof(WCHAR) ))
             return 0;
         return HWND_16( WIN_CreateWindowEx( &cs, bufferW, 0 ));
     }
     else
     {
         if (!GlobalGetAtomNameA( LOWORD(className), buffer, sizeof(buffer) ))
         {
             ERR( "bad atom %x\n", LOWORD(className));
             return 0;
         }
         cs.lpszClass = buffer;
         return HWND_16( WIN_CreateWindowEx( &cs, (LPCWSTR)className, 0 ));
     }
 }
 
 
 /***********************************************************************
  *              CreateWindowExA (USER32.@)
  */
 HWND WINAPI CreateWindowExA( DWORD exStyle, LPCSTR className,
                                  LPCSTR windowName, DWORD style, INT x,
                                  INT y, INT width, INT height,
                                  HWND parent, HMENU menu,
                                  HINSTANCE instance, LPVOID data )
 {
     CREATESTRUCTA cs;
 
     cs.lpCreateParams = data;
     cs.hInstance      = instance;
     cs.hMenu          = menu;
     cs.hwndParent     = parent;
     cs.x              = x;
     cs.y              = y;
     cs.cx             = width;
     cs.cy             = height;
     cs.style          = style;
     cs.lpszName       = windowName;
     cs.lpszClass      = className;
     cs.dwExStyle      = exStyle;
 
     if (!IS_INTRESOURCE(className))
     {
         WCHAR bufferW[256];
         if (!MultiByteToWideChar( CP_ACP, 0, className, -1, bufferW, sizeof(bufferW)/sizeof(WCHAR) ))
             return 0;
         return WIN_CreateWindowEx( &cs, bufferW, WIN_ISWIN32 );
     }
     return WIN_CreateWindowEx( &cs, (LPCWSTR)className, WIN_ISWIN32 );
 }
 
 
 /***********************************************************************
  *              CreateWindowExW (USER32.@)
  */
 HWND WINAPI CreateWindowExW( DWORD exStyle, LPCWSTR className,
                                  LPCWSTR windowName, DWORD style, INT x,
                                  INT y, INT width, INT height,
                                  HWND parent, HMENU menu,
                                  HINSTANCE instance, LPVOID data )
 {
     CREATESTRUCTW cs;
 
     cs.lpCreateParams = data;
     cs.hInstance      = instance;
     cs.hMenu          = menu;
     cs.hwndParent     = parent;
     cs.x              = x;
     cs.y              = y;
     cs.cx             = width;
     cs.cy             = height;
     cs.style          = style;
     cs.lpszName       = windowName;
     cs.lpszClass      = className;
     cs.dwExStyle      = exStyle;
 
     /* Note: we rely on the fact that CREATESTRUCTA and */
     /* CREATESTRUCTW have the same layout. */
     return WIN_CreateWindowEx( (CREATESTRUCTA *)&cs, className, WIN_ISWIN32 | WIN_ISUNICODE );
 }
 
 
 /***********************************************************************
  *           WIN_SendDestroyMsg
  */
 static void WIN_SendDestroyMsg( HWND hwnd )
 {
     GUITHREADINFO info;
 
     if (GetGUIThreadInfo( GetCurrentThreadId(), &info ))
     {
         if (hwnd == info.hwndCaret) DestroyCaret();
         if (hwnd == info.hwndActive) WINPOS_ActivateOtherWindow( hwnd );
     }
 
     /*
      * Send the WM_DESTROY to the window.
      */
     SendMessageW( hwnd, WM_DESTROY, 0, 0);
 
     /*
      * This WM_DESTROY message can trigger re-entrant calls to DestroyWindow
      * make sure that the window still exists when we come back.
      */
     if (IsWindow(hwnd))
     {
         HWND* pWndArray;
         int i;
 
         if (!(pWndArray = WIN_ListChildren( hwnd ))) return;
 
         for (i = 0; pWndArray[i]; i++)
         {
             if (IsWindow( pWndArray[i] )) WIN_SendDestroyMsg( pWndArray[i] );
         }
         HeapFree( GetProcessHeap(), 0, pWndArray );
     }
     else
       WARN("\tdestroyed itself while in WM_DESTROY!\n");
 }
 
 
 /***********************************************************************
  *              DestroyWindow (USER32.@)
  */
 BOOL WINAPI DestroyWindow( HWND hwnd )
 {
     BOOL is_child;
 
     if (!(hwnd = WIN_IsCurrentThread( hwnd )) || is_desktop_window( hwnd ))
     {
         SetLastError( ERROR_ACCESS_DENIED );
         return FALSE;
     }
 
     TRACE("(%p)\n", hwnd);
 
       /* Call hooks */
 
     if (HOOK_CallHooks( WH_CBT, HCBT_DESTROYWND, (WPARAM)hwnd, 0, TRUE )) return FALSE;
 
     if (MENU_IsMenuActive() == hwnd)
         EndMenu();
 
     is_child = (GetWindowLongW( hwnd, GWL_STYLE ) & WS_CHILD) != 0;
 
     if (is_child)
     {
         if (!USER_IsExitingThread( GetCurrentThreadId() ))
             send_parent_notify( hwnd, WM_DESTROY );
     }
     else if (!GetWindow( hwnd, GW_OWNER ))
     {
         HOOK_CallHooks( WH_SHELL, HSHELL_WINDOWDESTROYED, (WPARAM)hwnd, 0L, TRUE );
         /* FIXME: clean up palette - see "Internals" p.352 */
     }
 
     if (!IsWindow(hwnd)) return TRUE;
 
       /* Hide the window */
     if (GetWindowLongW( hwnd, GWL_STYLE ) & WS_VISIBLE)
     {
         /* Only child windows receive WM_SHOWWINDOW in DestroyWindow() */
         if (is_child)
             ShowWindow( hwnd, SW_HIDE );
         else
             SetWindowPos( hwnd, 0, 0, 0, 0, 0, SWP_NOMOVE | SWP_NOSIZE |
                           SWP_NOZORDER | SWP_NOACTIVATE | SWP_HIDEWINDOW );
     }
 
     if (!IsWindow(hwnd)) return TRUE;
 
       /* Recursively destroy owned windows */
 
     if (!is_child)
     {
         for (;;)
         {
             int i, got_one = 0;
             HWND *list = WIN_ListChildren( GetDesktopWindow() );
             if (list)
             {
                 for (i = 0; list[i]; i++)
                 {
                     if (GetWindow( list[i], GW_OWNER ) != hwnd) continue;
                     if (WIN_IsCurrentThread( list[i] ))
                     {
                         DestroyWindow( list[i] );
                         got_one = 1;
                         continue;
                     }
                     WIN_SetOwner( list[i], 0 );
                 }
                 HeapFree( GetProcessHeap(), 0, list );
             }
             if (!got_one) break;
         }
     }
 
       /* Send destroy messages */
 
     WIN_SendDestroyMsg( hwnd );
     if (!IsWindow( hwnd )) return TRUE;
 
     if (GetClipboardOwner() == hwnd)
         CLIPBOARD_ReleaseOwner();
 
       /* Destroy the window storage */
 
     WIN_DestroyWindow( hwnd );
     return TRUE;
 }
 
 
 /***********************************************************************
  *              CloseWindow (USER32.@)
  */
 BOOL WINAPI CloseWindow( HWND hwnd )
 {
     if (GetWindowLongW( hwnd, GWL_STYLE ) & WS_CHILD) return FALSE;
     ShowWindow( hwnd, SW_MINIMIZE );
     return TRUE;
 }
 
 
 /***********************************************************************
  *              OpenIcon (USER32.@)
  */
 BOOL WINAPI OpenIcon( HWND hwnd )
 {
     if (!IsIconic( hwnd )) return FALSE;
     ShowWindow( hwnd, SW_SHOWNORMAL );
     return TRUE;
 }
 
 
 /***********************************************************************
  *              FindWindowExW (USER32.@)
  */
 HWND WINAPI FindWindowExW( HWND parent, HWND child, LPCWSTR className, LPCWSTR title )
 {
     HWND *list = NULL;
     HWND retvalue = 0;
     int i = 0, len = 0;
     WCHAR *buffer = NULL;
 
     if (!parent && child) parent = GetDesktopWindow();
     else if (parent == HWND_MESSAGE) parent = get_hwnd_message_parent();
 
     if (title)
     {
         len = strlenW(title) + 1;  /* one extra char to check for chars beyond the end */
         if (!(buffer = HeapAlloc( GetProcessHeap(), 0, (len + 1) * sizeof(WCHAR) ))) return 0;
     }
 
     if (!(list = list_window_children( 0, parent, className, 0 ))) goto done;
 
     if (child)
     {
         child = WIN_GetFullHandle( child );
         while (list[i] && list[i] != child) i++;
         if (!list[i]) goto done;
         i++;  /* start from next window */
     }
 
     if (title)
     {
         while (list[i])
         {
             if (GetWindowTextW( list[i], buffer, len + 1 ) && !strcmpiW( buffer, title )) break;
             i++;
         }
     }
     retvalue = list[i];
 
  done:
     HeapFree( GetProcessHeap(), 0, list );
     HeapFree( GetProcessHeap(), 0, buffer );
     return retvalue;
 }
 
 
 
 /***********************************************************************
  *              FindWindowA (USER32.@)
  */
 HWND WINAPI FindWindowA( LPCSTR className, LPCSTR title )
 {
     HWND ret = FindWindowExA( 0, 0, className, title );
     if (!ret) SetLastError (ERROR_CANNOT_FIND_WND_CLASS);
     return ret;
 }
 
 
 /***********************************************************************
  *              FindWindowExA (USER32.@)
  */
 HWND WINAPI FindWindowExA( HWND parent, HWND child, LPCSTR className, LPCSTR title )
 {
     LPWSTR titleW = NULL;
     HWND hwnd = 0;
 
     if (title)
     {
         DWORD len = MultiByteToWideChar( CP_ACP, 0, title, -1, NULL, 0 );
         if (!(titleW = HeapAlloc( GetProcessHeap(), 0, len * sizeof(WCHAR) ))) return 0;
         MultiByteToWideChar( CP_ACP, 0, title, -1, titleW, len );
     }
 
     if (!IS_INTRESOURCE(className))
     {
         WCHAR classW[256];
         if (MultiByteToWideChar( CP_ACP, 0, className, -1, classW, sizeof(classW)/sizeof(WCHAR) ))
             hwnd = FindWindowExW( parent, child, classW, titleW );
     }
     else
     {
         hwnd = FindWindowExW( parent, child, (LPCWSTR)className, titleW );
     }
 
     HeapFree( GetProcessHeap(), 0, titleW );
     return hwnd;
 }
 
 
 /***********************************************************************
  *              FindWindowW (USER32.@)
  */
 HWND WINAPI FindWindowW( LPCWSTR className, LPCWSTR title )
 {
     return FindWindowExW( 0, 0, className, title );
 }
 
 
 /**********************************************************************
  *              GetDesktopWindow (USER32.@)
  */
 HWND WINAPI GetDesktopWindow(void)
 {
     struct user_thread_info *thread_info = get_user_thread_info();
 
     if (thread_info->top_window) return thread_info->top_window;
 
     SERVER_START_REQ( get_desktop_window )
     {
         req->force = 0;
         if (!wine_server_call( req ))
         {
             thread_info->top_window = wine_server_ptr_handle( reply->top_window );
             thread_info->msg_window = wine_server_ptr_handle( reply->msg_window );
         }
     }
     SERVER_END_REQ;
 
     if (!thread_info->top_window)
     {
         USEROBJECTFLAGS flags;
         if (!GetUserObjectInformationW( GetProcessWindowStation(), UOI_FLAGS, &flags,
                                         sizeof(flags), NULL ) || (flags.dwFlags & WSF_VISIBLE))
         {
             static const WCHAR command_line[] = {'\\','e','x','p','l','o','r','e','r','.','e','x','e',' ','/','d','e','s','k','t','o','p',0};
             STARTUPINFOW si;
             PROCESS_INFORMATION pi;
             WCHAR systemdir[MAX_PATH];
             WCHAR cmdline[MAX_PATH + sizeof(command_line)/sizeof(WCHAR)];
 
             memset( &si, 0, sizeof(si) );
             si.cb = sizeof(si);
             si.dwFlags = STARTF_USESTDHANDLES;
             si.hStdInput  = 0;
             si.hStdOutput = 0;
             si.hStdError  = GetStdHandle( STD_ERROR_HANDLE );
 
             GetSystemDirectoryW( systemdir, MAX_PATH );
             lstrcpyW( cmdline, systemdir );
             lstrcatW( cmdline, command_line );
             if (CreateProcessW( NULL, cmdline, NULL, NULL, FALSE, DETACHED_PROCESS,
                                 NULL, systemdir, &si, &pi ))
             {
                 TRACE( "started explorer pid %04x tid %04x\n", pi.dwProcessId, pi.dwThreadId );
                 WaitForInputIdle( pi.hProcess, 10000 );
                 CloseHandle( pi.hThread );
                 CloseHandle( pi.hProcess );
             }
             else WARN( "failed to start explorer, err %d\n", GetLastError() );
         }
         else TRACE( "not starting explorer since winstation is not visible\n" );
 
         SERVER_START_REQ( get_desktop_window )
         {
             req->force = 1;
             if (!wine_server_call( req ))
             {
                 thread_info->top_window = wine_server_ptr_handle( reply->top_window );
                 thread_info->msg_window = wine_server_ptr_handle( reply->msg_window );
             }
         }
         SERVER_END_REQ;
     }
 
     if (!thread_info->top_window || !USER_Driver->pCreateDesktopWindow( thread_info->top_window ))
         ERR( "failed to create desktop window\n" );
 
     return thread_info->top_window;
 }
 
 
 /*******************************************************************
  *              EnableWindow (USER32.@)
  */
 BOOL WINAPI EnableWindow( HWND hwnd, BOOL enable )
 {
     BOOL retvalue;
     HWND full_handle;
 
     if (is_broadcast(hwnd))
     {
         SetLastError( ERROR_INVALID_PARAMETER );
         return FALSE;
     }
 
     if (!(full_handle = WIN_IsCurrentThread( hwnd )))
         return SendMessageW( hwnd, WM_WINE_ENABLEWINDOW, enable, 0 );
 
     hwnd = full_handle;
 
     TRACE("( %p, %d )\n", hwnd, enable);
 
     retvalue = !IsWindowEnabled( hwnd );
 
     if (enable && retvalue)
     {
         WIN_SetStyle( hwnd, 0, WS_DISABLED );
         SendMessageW( hwnd, WM_ENABLE, TRUE, 0 );
     }
     else if (!enable && !retvalue)
     {
         HWND capture_wnd;
 
         SendMessageW( hwnd, WM_CANCELMODE, 0, 0);
 
         WIN_SetStyle( hwnd, WS_DISABLED, 0 );
 
         if (hwnd == GetFocus())
             SetFocus( 0 );  /* A disabled window can't have the focus */
 
         capture_wnd = GetCapture();
         if (hwnd == capture_wnd || IsChild(hwnd, capture_wnd))
             ReleaseCapture();  /* A disabled window can't capture the mouse */
 
         SendMessageW( hwnd, WM_ENABLE, FALSE, 0 );
     }
     return retvalue;
 }
 
 
 /***********************************************************************
  *              IsWindowEnabled (USER32.@)
  */
 BOOL WINAPI IsWindowEnabled(HWND hWnd)
 {
     return !(GetWindowLongW( hWnd, GWL_STYLE ) & WS_DISABLED);
 }
 
 
 /***********************************************************************
  *              IsWindowUnicode (USER32.@)
  */
 BOOL WINAPI IsWindowUnicode( HWND hwnd )
 {
     WND * wndPtr;
     BOOL retvalue = FALSE;
 
     if (!(wndPtr = WIN_GetPtr(hwnd))) return FALSE;
 
     if (wndPtr == WND_DESKTOP) return TRUE;
 
     if (wndPtr != WND_OTHER_PROCESS)
     {
         retvalue = (wndPtr->flags & WIN_ISUNICODE) != 0;
         WIN_ReleasePtr( wndPtr );
     }
     else
     {
         SERVER_START_REQ( get_window_info )
         {
             req->handle = wine_server_user_handle( hwnd );
             if (!wine_server_call_err( req )) retvalue = reply->is_unicode;
         }
         SERVER_END_REQ;
     }
     return retvalue;
 }
 
 
 /**********************************************************************
  *           WIN_GetWindowLong
  *
  * Helper function for GetWindowLong().
  */
 static LONG_PTR WIN_GetWindowLong( HWND hwnd, INT offset, UINT size, BOOL unicode )
 {
     LONG_PTR retvalue = 0;
     WND *wndPtr;
 
     if (offset == GWLP_HWNDPARENT)
     {
         HWND parent = GetAncestor( hwnd, GA_PARENT );
         if (parent == GetDesktopWindow()) parent = GetWindow( hwnd, GW_OWNER );
         return (ULONG_PTR)parent;
     }
 
     if (!(wndPtr = WIN_GetPtr( hwnd )))
     {
         SetLastError( ERROR_INVALID_WINDOW_HANDLE );
         return 0;
     }
 
     if (wndPtr == WND_OTHER_PROCESS || wndPtr == WND_DESKTOP)
     {
         if (offset == GWLP_WNDPROC)
         {
             SetLastError( ERROR_ACCESS_DENIED );
             return 0;
         }
         SERVER_START_REQ( set_window_info )
         {
             req->handle = wine_server_user_handle( hwnd );
             req->flags  = 0;  /* don't set anything, just retrieve */
             req->extra_offset = (offset >= 0) ? offset : -1;
             req->extra_size = (offset >= 0) ? size : 0;
             if (!wine_server_call_err( req ))
             {
                 switch(offset)
                 {
                 case GWL_STYLE:      retvalue = reply->old_style; break;
                 case GWL_EXSTYLE:    retvalue = reply->old_ex_style; break;
                 case GWLP_ID:        retvalue = reply->old_id; break;
                 case GWLP_HINSTANCE: retvalue = (ULONG_PTR)wine_server_get_ptr( reply->old_instance ); break;
                 case GWLP_USERDATA:  retvalue = reply->old_user_data; break;
                 default:
                     if (offset >= 0) retvalue = get_win_data( &reply->old_extra_value, size );
                     else SetLastError( ERROR_INVALID_INDEX );
                     break;
                 }
             }
         }
         SERVER_END_REQ;
         return retvalue;
     }
 
     /* now we have a valid wndPtr */
 
     if (offset >= 0)
     {
         if (offset > (int)(wndPtr->cbWndExtra - size))
         {
             WARN("Invalid offset %d\n", offset );
             WIN_ReleasePtr( wndPtr );
             SetLastError( ERROR_INVALID_INDEX );
             return 0;
         }
         retvalue = get_win_data( (char *)wndPtr->wExtra + offset, size );
 
         /* Special case for dialog window procedure */
         if ((offset == DWLP_DLGPROC) && (size == sizeof(LONG_PTR)) && (wndPtr->flags & WIN_ISDIALOG))
             retvalue = (LONG_PTR)WINPROC_GetProc( (WNDPROC)retvalue, unicode );
         WIN_ReleasePtr( wndPtr );
         return retvalue;
     }
 
     switch(offset)
     {
     case GWLP_USERDATA:  retvalue = wndPtr->userdata; break;
     case GWL_STYLE:      retvalue = wndPtr->dwStyle; break;
     case GWL_EXSTYLE:    retvalue = wndPtr->dwExStyle; break;
     case GWLP_ID:        retvalue = wndPtr->wIDmenu; break;
     case GWLP_HINSTANCE: retvalue = (ULONG_PTR)wndPtr->hInstance; break;
     case GWLP_WNDPROC:
         /* This looks like a hack only for the edit control (see tests). This makes these controls
          * more tolerant to A/W mismatches. The lack of W->A->W conversion for such a mismatch suggests
          * that the hack is in GetWindowLongPtr[AW], not in winprocs.
          */
         if (wndPtr->winproc == EDIT_winproc_handle && (!unicode != !(wndPtr->flags & WIN_ISUNICODE)))
             retvalue = (ULONG_PTR)wndPtr->winproc;
         else
             retvalue = (ULONG_PTR)WINPROC_GetProc( wndPtr->winproc, unicode );
         break;
     default:
         WARN("Unknown offset %d\n", offset );
         SetLastError( ERROR_INVALID_INDEX );
         break;
     }
     WIN_ReleasePtr(wndPtr);
     return retvalue;
 }
 
 
 /**********************************************************************
  *           WIN_SetWindowLong
  *
  * Helper function for SetWindowLong().
  *
  * 0 is the failure code. However, in the case of failure SetLastError
  * must be set to distinguish between a 0 return value and a failure.
  */
 LONG_PTR WIN_SetWindowLong( HWND hwnd, INT offset, UINT size, LONG_PTR newval, BOOL unicode )
 {
     STYLESTRUCT style;
     BOOL ok;
     LONG_PTR retval = 0;
     WND *wndPtr;
 
     TRACE( "%p %d %lx %c\n", hwnd, offset, newval, unicode ? 'W' : 'A' );
 
     if (is_broadcast(hwnd))
     {
         SetLastError( ERROR_INVALID_PARAMETER );
         return FALSE;
     }
 
     if (!(wndPtr = WIN_GetPtr( hwnd )))
     {
         SetLastError( ERROR_INVALID_WINDOW_HANDLE );
         return 0;
     }
     if (wndPtr == WND_DESKTOP)
     {
         /* can't change anything on the desktop window */
         SetLastError( ERROR_ACCESS_DENIED );
         return 0;
     }
     if (wndPtr == WND_OTHER_PROCESS)
     {
         if (offset == GWLP_WNDPROC)
         {
             SetLastError( ERROR_ACCESS_DENIED );
             return 0;
         }
         if (offset > 32767 || offset < -32767)
         {
             SetLastError( ERROR_INVALID_INDEX );
             return 0;
         }
         return SendMessageW( hwnd, WM_WINE_SETWINDOWLONG, MAKEWPARAM( offset, size ), newval );
     }
 
     /* first some special cases */
     switch( offset )
     {
     case GWL_STYLE:
     case GWL_EXSTYLE:
         style.styleOld =
             offset == GWL_STYLE ? wndPtr->dwStyle : wndPtr->dwExStyle;
         style.styleNew = newval;
         WIN_ReleasePtr( wndPtr );
         SendMessageW( hwnd, WM_STYLECHANGING, offset, (LPARAM)&style );
         if (!(wndPtr = WIN_GetPtr( hwnd )) || wndPtr == WND_OTHER_PROCESS) return 0;
         newval = style.styleNew;
         break;
     case GWLP_HWNDPARENT:
         if (wndPtr->parent == GetDesktopWindow())
         {
             WIN_ReleasePtr( wndPtr );
             return (ULONG_PTR)WIN_SetOwner( hwnd, (HWND)newval );
         }
         else
         {
             WIN_ReleasePtr( wndPtr );
             return (ULONG_PTR)SetParent( hwnd, (HWND)newval );
         }
     case GWLP_WNDPROC:
     {
         WNDPROC proc;
         UINT old_flags = wndPtr->flags;
         retval = WIN_GetWindowLong( hwnd, offset, size, unicode );
         if (unicode) proc = WINPROC_AllocProc( NULL, (WNDPROC)newval );
         else proc = WINPROC_AllocProc( (WNDPROC)newval, NULL );
         if (proc) wndPtr->winproc = proc;
         if (WINPROC_IsUnicode( proc, unicode )) wndPtr->flags |= WIN_ISUNICODE;
         else wndPtr->flags &= ~WIN_ISUNICODE;
         if (!((old_flags ^ wndPtr->flags) & WIN_ISUNICODE))
         {
             WIN_ReleasePtr( wndPtr );
             return retval;
         }
         /* update is_unicode flag on the server side */
         break;
     }
     case GWLP_ID:
     case GWLP_HINSTANCE:
     case GWLP_USERDATA:
         break;
     case DWLP_DLGPROC:
         if ((wndPtr->cbWndExtra - sizeof(LONG_PTR) >= DWLP_DLGPROC) &&
             (size == sizeof(LONG_PTR)) && (wndPtr->flags & WIN_ISDIALOG))
         {
             WNDPROC *ptr = (WNDPROC *)((char *)wndPtr->wExtra + DWLP_DLGPROC);
             retval = (ULONG_PTR)WINPROC_GetProc( *ptr, unicode );
             if (unicode) *ptr = WINPROC_AllocProc( NULL, (WNDPROC)newval );
             else *ptr = WINPROC_AllocProc( (WNDPROC)newval, NULL );
             WIN_ReleasePtr( wndPtr );
             return retval;
         }
         /* fall through */
     default:
         if (offset < 0 || offset > (int)(wndPtr->cbWndExtra - size))
         {
             WARN("Invalid offset %d\n", offset );
             WIN_ReleasePtr( wndPtr );
             SetLastError( ERROR_INVALID_INDEX );
             return 0;
         }
         else if (get_win_data( (char *)wndPtr->wExtra + offset, size ) == newval)
         {
             /* already set to the same value */
             WIN_ReleasePtr( wndPtr );
             return newval;
         }
         break;
     }
 
     SERVER_START_REQ( set_window_info )
     {
         req->handle = wine_server_user_handle( hwnd );
         req->extra_offset = -1;
         switch(offset)
         {
         case GWL_STYLE:
             req->flags = SET_WIN_STYLE;
             req->style = newval;
             break;
         case GWL_EXSTYLE:
             req->flags = SET_WIN_EXSTYLE;
             /* WS_EX_TOPMOST can only be changed through SetWindowPos */
             newval = (newval & ~WS_EX_TOPMOST) | (wndPtr->dwExStyle & WS_EX_TOPMOST);
             req->ex_style = newval;
             break;
         case GWLP_ID:
             req->flags = SET_WIN_ID;
             req->id = newval;
             break;
         case GWLP_HINSTANCE:
             req->flags = SET_WIN_INSTANCE;
             req->instance = wine_server_client_ptr( (void *)newval );
             break;
         case GWLP_WNDPROC:
             req->flags = SET_WIN_UNICODE;
             req->is_unicode = (wndPtr->flags & WIN_ISUNICODE) != 0;
             break;
         case GWLP_USERDATA:
             req->flags = SET_WIN_USERDATA;
             req->user_data = newval;
             break;
         default:
             req->flags = SET_WIN_EXTRA;
             req->extra_offset = offset;
             req->extra_size = size;
             set_win_data( &req->extra_value, newval, size );
         }
         if ((ok = !wine_server_call_err( req )))
         {
             switch(offset)
             {
             case GWL_STYLE:
                 wndPtr->dwStyle = newval;
                 retval = reply->old_style;
                 break;
             case GWL_EXSTYLE:
                 wndPtr->dwExStyle = newval;
                 retval = reply->old_ex_style;
                 break;
             case GWLP_ID:
                 wndPtr->wIDmenu = newval;
                 retval = reply->old_id;
                 break;
             case GWLP_HINSTANCE:
                 wndPtr->hInstance = (HINSTANCE)newval;
                 retval = (ULONG_PTR)wine_server_get_ptr( reply->old_instance );
                 break;
             case GWLP_WNDPROC:
                 break;
             case GWLP_USERDATA:
                 wndPtr->userdata = newval;
                 retval = reply->old_user_data;
                 break;
             default:
                 retval = get_win_data( (char *)wndPtr->wExtra + offset, size );
                 set_win_data( (char *)wndPtr->wExtra + offset, newval, size );
                 break;
             }
         }
     }
     SERVER_END_REQ;
     WIN_ReleasePtr( wndPtr );
 
     if (!ok) return 0;
 
     if (offset == GWL_STYLE || offset == GWL_EXSTYLE)
     {
         USER_Driver->pSetWindowStyle( hwnd, offset, &style );
         SendMessageW( hwnd, WM_STYLECHANGED, offset, (LPARAM)&style );
     }
 
     return retval;
 }
 
 
 /**********************************************************************
  *              GetWindowLong (USER.135)
  */
 LONG WINAPI GetWindowLong16( HWND16 hwnd, INT16 offset )
 {
     WND *wndPtr;
     LONG_PTR retvalue;
     BOOL is_winproc = (offset == GWLP_WNDPROC);
 
     if (offset >= 0)
     {
         if (!(wndPtr = WIN_GetPtr( WIN_Handle32(hwnd) )))
         {
             SetLastError( ERROR_INVALID_WINDOW_HANDLE );
             return 0;
         }
         if (wndPtr != WND_OTHER_PROCESS && wndPtr != WND_DESKTOP)
         {
             if (offset > (int)(wndPtr->cbWndExtra - sizeof(LONG)))
             {
                 /*
                  * Some programs try to access last element from 16 bit
                  * code using illegal offset value. Hopefully this is
                  * what those programs really expect.
                  */
                 if (wndPtr->cbWndExtra >= 4 && offset == wndPtr->cbWndExtra - sizeof(WORD))
                 {
                     INT offset2 = wndPtr->cbWndExtra - sizeof(LONG);
                     ERR( "- replaced invalid offset %d with %d\n", offset, offset2 );
                     offset = offset2;
                 }
                 else
                 {
                     WARN("Invalid offset %d\n", offset );
                     WIN_ReleasePtr( wndPtr );
                     SetLastError( ERROR_INVALID_INDEX );
                     return 0;
                 }
             }
             is_winproc = ((offset == DWLP_DLGPROC) && (wndPtr->flags & WIN_ISDIALOG));
             WIN_ReleasePtr( wndPtr );
         }
     }
     retvalue = GetWindowLongA( WIN_Handle32(hwnd), offset );
     if (is_winproc) retvalue = (LONG_PTR)WINPROC_GetProc16( (WNDPROC)retvalue, FALSE );
     return retvalue;
 }
 
 
 /**********************************************************************
  *              GetWindowWord (USER32.@)
  */
 WORD WINAPI GetWindowWord( HWND hwnd, INT offset )
 {
     switch(offset)
     {
     case GWLP_ID:
     case GWLP_HINSTANCE:
     case GWLP_HWNDPARENT:
         break;
     default:
         if (offset < 0)
         {
             WARN("Invalid offset %d\n", offset );
             SetLastError( ERROR_INVALID_INDEX );
             return 0;
         }
         break;
     }
     return WIN_GetWindowLong( hwnd, offset, sizeof(WORD), FALSE );
 }
 
 
 /**********************************************************************
  *              GetWindowLongA (USER32.@)
  */
 LONG WINAPI GetWindowLongA( HWND hwnd, INT offset )
 {
     return WIN_GetWindowLong( hwnd, offset, sizeof(LONG), FALSE );
 }
 
 
 /**********************************************************************
  *              GetWindowLongW (USER32.@)
  */
 LONG WINAPI GetWindowLongW( HWND hwnd, INT offset )
 {
     return WIN_GetWindowLong( hwnd, offset, sizeof(LONG), TRUE );
 }
 
 
 /**********************************************************************
  *              SetWindowLong (USER.136)
  */
 LONG WINAPI SetWindowLong16( HWND16 hwnd, INT16 offset, LONG newval )
 {
     WND *wndPtr;
     BOOL is_winproc = (offset == GWLP_WNDPROC);
 
     if (offset == DWLP_DLGPROC)
     {
         if (!(wndPtr = WIN_GetPtr( WIN_Handle32(hwnd) )))
         {
             SetLastError( ERROR_INVALID_WINDOW_HANDLE );
             return 0;
         }
         if (wndPtr != WND_OTHER_PROCESS && wndPtr != WND_DESKTOP)
         {
             is_winproc = ((wndPtr->cbWndExtra - sizeof(LONG_PTR) >= DWLP_DLGPROC) &&
                           (wndPtr->flags & WIN_ISDIALOG));
             WIN_ReleasePtr( wndPtr );
         }
     }
 
     if (is_winproc)
     {
         WNDPROC new_proc = WINPROC_AllocProc16( (WNDPROC16)newval );
         WNDPROC old_proc = (WNDPROC)SetWindowLongPtrA( WIN_Handle32(hwnd), offset, (LONG_PTR)new_proc );
         return (LONG)WINPROC_GetProc16( old_proc, FALSE );
     }
     else return SetWindowLongA( WIN_Handle32(hwnd), offset, newval );
 }
 
 
 /**********************************************************************
  *              SetWindowWord (USER32.@)
  */
 WORD WINAPI SetWindowWord( HWND hwnd, INT offset, WORD newval )
 {
     switch(offset)
     {
     case GWLP_ID:
     case GWLP_HINSTANCE:
     case GWLP_HWNDPARENT:
         break;
     default:
         if (offset < 0)
         {
             WARN("Invalid offset %d\n", offset );
             SetLastError( ERROR_INVALID_INDEX );
             return 0;
         }
         break;
     }
     return WIN_SetWindowLong( hwnd, offset, sizeof(WORD), newval, FALSE );
 }
 
 
 /**********************************************************************
  *              SetWindowLongA (USER32.@)
  *
  * See SetWindowLongW.
  */
 LONG WINAPI SetWindowLongA( HWND hwnd, INT offset, LONG newval )
 {
     return WIN_SetWindowLong( hwnd, offset, sizeof(LONG), newval, FALSE );
 }
 
 
 /**********************************************************************
  *              SetWindowLongW (USER32.@) Set window attribute
  *
  * SetWindowLong() alters one of a window's attributes or sets a 32-bit (long)
  * value in a window's extra memory.
  *
  * The _hwnd_ parameter specifies the window.  is the handle to a
  * window that has extra memory. The _newval_ parameter contains the
  * new attribute or extra memory value.  If positive, the _offset_
  * parameter is the byte-addressed location in the window's extra
  * memory to set.  If negative, _offset_ specifies the window
  * attribute to set, and should be one of the following values:
  *
  * GWL_EXSTYLE      The window's extended window style
  *
  * GWL_STYLE        The window's window style.
  *
  * GWLP_WNDPROC     Pointer to the window's window procedure.
  *
  * GWLP_HINSTANCE   The window's pplication instance handle.
  *
  * GWLP_ID          The window's identifier.
  *
  * GWLP_USERDATA    The window's user-specified data.
  *
  * If the window is a dialog box, the _offset_ parameter can be one of
  * the following values:
  *
  * DWLP_DLGPROC     The address of the window's dialog box procedure.
  *
  * DWLP_MSGRESULT   The return value of a message
  *                  that the dialog box procedure processed.
  *
  * DWLP_USER        Application specific information.
  *
  * RETURNS
  *
  * If successful, returns the previous value located at _offset_. Otherwise,
  * returns 0.
  *
  * NOTES
  *
  * Extra memory for a window class is specified by a nonzero cbWndExtra
  * parameter of the WNDCLASS structure passed to RegisterClass() at the
  * time of class creation.
  *
  * Using GWL_WNDPROC to set a new window procedure effectively creates
  * a window subclass. Use CallWindowProc() in the new windows procedure
  * to pass messages to the superclass's window procedure.
  *
  * The user data is reserved for use by the application which created
  * the window.
  *
  * Do not use GWL_STYLE to change the window's WS_DISABLED style;
  * instead, call the EnableWindow() function to change the window's
  * disabled state.
  *
  * Do not use GWL_HWNDPARENT to reset the window's parent, use
  * SetParent() instead.
  *
  * Win95:
  * When offset is GWL_STYLE and the calling app's ver is 4.0,
  * it sends WM_STYLECHANGING before changing the settings
  * and WM_STYLECHANGED afterwards.
  * App ver 4.0 can't use SetWindowLong to change WS_EX_TOPMOST.
  */
 LONG WINAPI SetWindowLongW(
     HWND hwnd,  /* [in] window to alter */
     INT offset, /* [in] offset, in bytes, of location to alter */
     LONG newval /* [in] new value of location */
 ) {
     return WIN_SetWindowLong( hwnd, offset, sizeof(LONG), newval, TRUE );
 }
 
 
 /*******************************************************************
  *              GetWindowTextA (USER32.@)
  */
 INT WINAPI GetWindowTextA( HWND hwnd, LPSTR lpString, INT nMaxCount )
 {
     WCHAR *buffer;
 
     if (!lpString) return 0;
 
     if (WIN_IsCurrentProcess( hwnd ))
         return (INT)SendMessageA( hwnd, WM_GETTEXT, nMaxCount, (LPARAM)lpString );
 
     /* when window belongs to other process, don't send a message */
     if (nMaxCount <= 0) return 0;
     if (!(buffer = HeapAlloc( GetProcessHeap(), 0, nMaxCount * sizeof(WCHAR) ))) return 0;
     get_server_window_text( hwnd, buffer, nMaxCount );
     if (!WideCharToMultiByte( CP_ACP, 0, buffer, -1, lpString, nMaxCount, NULL, NULL ))
         lpString[nMaxCount-1] = 0;
     HeapFree( GetProcessHeap(), 0, buffer );
     return strlen(lpString);
 }
 
 
 /*******************************************************************
  *              InternalGetWindowText (USER32.@)
  */
 INT WINAPI InternalGetWindowText(HWND hwnd,LPWSTR lpString,INT nMaxCount )
 {
     WND *win;
 
     if (nMaxCount <= 0) return 0;
     if (!(win = WIN_GetPtr( hwnd ))) return 0;
     if (win == WND_DESKTOP) lpString[0] = 0;
     else if (win != WND_OTHER_PROCESS)
     {
         if (win->text) lstrcpynW( lpString, win->text, nMaxCount );
         else lpString[0] = 0;
         WIN_ReleasePtr( win );
     }
     else
     {
         get_server_window_text( hwnd, lpString, nMaxCount );
     }
     return strlenW(lpString);
 }
 
 
 /*******************************************************************
  *              GetWindowTextW (USER32.@)
  */
 INT WINAPI GetWindowTextW( HWND hwnd, LPWSTR lpString, INT nMaxCount )
 {
     if (!lpString) return 0;
 
     if (WIN_IsCurrentProcess( hwnd ))
         return (INT)SendMessageW( hwnd, WM_GETTEXT, nMaxCount, (LPARAM)lpString );
 
     /* when window belongs to other process, don't send a message */
     if (nMaxCount <= 0) return 0;
     get_server_window_text( hwnd, lpString, nMaxCount );
     return strlenW(lpString);
 }
 
 
 /*******************************************************************
  *              SetWindowTextA (USER32.@)
  *              SetWindowText  (USER32.@)
  */
 BOOL WINAPI SetWindowTextA( HWND hwnd, LPCSTR lpString )
 {
     if (is_broadcast(hwnd))
     {
         SetLastError( ERROR_INVALID_PARAMETER );
         return FALSE;
     }
     if (!WIN_IsCurrentProcess( hwnd ))
         WARN( "setting text %s of other process window %p should not use SendMessage\n",
                debugstr_a(lpString), hwnd );
     return (BOOL)SendMessageA( hwnd, WM_SETTEXT, 0, (LPARAM)lpString );
 }
 
 
 /*******************************************************************
  *              SetWindowTextW (USER32.@)
  */
 BOOL WINAPI SetWindowTextW( HWND hwnd, LPCWSTR lpString )
 {
     if (is_broadcast(hwnd))
     {
         SetLastError( ERROR_INVALID_PARAMETER );
         return FALSE;
     }
     if (!WIN_IsCurrentProcess( hwnd ))
         WARN( "setting text %s of other process window %p should not use SendMessage\n",
                debugstr_w(lpString), hwnd );
     return (BOOL)SendMessageW( hwnd, WM_SETTEXT, 0, (LPARAM)lpString );
 }
 
 
 /*******************************************************************
  *              GetWindowTextLengthA (USER32.@)
  */
 INT WINAPI GetWindowTextLengthA( HWND hwnd )
 {
     return SendMessageA( hwnd, WM_GETTEXTLENGTH, 0, 0 );
 }
 
 /*******************************************************************
  *              GetWindowTextLengthW (USER32.@)
  */
 INT WINAPI GetWindowTextLengthW( HWND hwnd )
 {
     return SendMessageW( hwnd, WM_GETTEXTLENGTH, 0, 0 );
 }
 
 
 /*******************************************************************
  *              IsWindow (USER32.@)
  */
 BOOL WINAPI IsWindow( HWND hwnd )
 {
     WND *ptr;
     BOOL ret;
 
     if (!(ptr = WIN_GetPtr( hwnd ))) return FALSE;
     if (ptr == WND_DESKTOP) return TRUE;
 
     if (ptr != WND_OTHER_PROCESS)
     {
         WIN_ReleasePtr( ptr );
         return TRUE;
     }
 
     /* check other processes */
     SERVER_START_REQ( get_window_info )
     {
         req->handle = wine_server_user_handle( hwnd );
         ret = !wine_server_call_err( req );
     }
     SERVER_END_REQ;
     return ret;
 }
 
 
 /***********************************************************************
  *              GetWindowThreadProcessId (USER32.@)
  */
 DWORD WINAPI GetWindowThreadProcessId( HWND hwnd, LPDWORD process )
 {
     WND *ptr;
     DWORD tid = 0;
 
     if (!(ptr = WIN_GetPtr( hwnd )))
     {
         SetLastError( ERROR_INVALID_WINDOW_HANDLE);
         return 0;
     }
 
     if (ptr != WND_OTHER_PROCESS && ptr != WND_DESKTOP)
     {
         /* got a valid window */
         tid = ptr->tid;
         if (process) *process = GetCurrentProcessId();
         WIN_ReleasePtr( ptr );
         return tid;
     }
 
     /* check other processes */
     SERVER_START_REQ( get_window_info )
     {
         req->handle = wine_server_user_handle( hwnd );
         if (!wine_server_call_err( req ))
         {
             tid = (DWORD)reply->tid;
             if (process) *process = (DWORD)reply->pid;
         }
     }
     SERVER_END_REQ;
     return tid;
 }
 
 
 /*****************************************************************
  *              GetParent (USER32.@)
  */
 HWND WINAPI GetParent( HWND hwnd )
 {
     WND *wndPtr;
     HWND retvalue = 0;
 
     if (!(wndPtr = WIN_GetPtr( hwnd )))
     {
         SetLastError( ERROR_INVALID_WINDOW_HANDLE );
         return 0;
     }
     if (wndPtr == WND_DESKTOP) return 0;
     if (wndPtr == WND_OTHER_PROCESS)
     {
         LONG style = GetWindowLongW( hwnd, GWL_STYLE );
         if (style & (WS_POPUP | WS_CHILD))
         {
             SERVER_START_REQ( get_window_tree )
             {
                 req->handle = wine_server_user_handle( hwnd );
                 if (!wine_server_call_err( req ))
                 {
                     if (style & WS_POPUP) retvalue = wine_server_ptr_handle( reply->owner );
                     else if (style & WS_CHILD) retvalue = wine_server_ptr_handle( reply->parent );
                 }
             }
             SERVER_END_REQ;
         }
     }
     else
     {
         if (wndPtr->dwStyle & WS_POPUP) retvalue = wndPtr->owner;
         else if (wndPtr->dwStyle & WS_CHILD) retvalue = wndPtr->parent;
         WIN_ReleasePtr( wndPtr );
     }
     return retvalue;
 }
 
 
 /*****************************************************************
  *              GetAncestor (USER32.@)
  */
 HWND WINAPI GetAncestor( HWND hwnd, UINT type )
 {
     WND *win;
     HWND *list, ret = 0;
 
     switch(type)
     {
     case GA_PARENT:
         if (!(win = WIN_GetPtr( hwnd )))
         {
             SetLastError( ERROR_INVALID_WINDOW_HANDLE );
             return 0;
         }
         if (win == WND_DESKTOP) return 0;
         if (win != WND_OTHER_PROCESS)
         {
             ret = win->parent;
             WIN_ReleasePtr( win );
         }
         else /* need to query the server */
         {
             SERVER_START_REQ( get_window_tree )
             {
                 req->handle = wine_server_user_handle( hwnd );
                 if (!wine_server_call_err( req )) ret = wine_server_ptr_handle( reply->parent );
             }
             SERVER_END_REQ;
         }
         break;
 
     case GA_ROOT:
         if (!(list = list_window_parents( hwnd ))) return 0;
 
         if (!list[0] || !list[1]) ret = WIN_GetFullHandle( hwnd );  /* top-level window */
         else
         {
             int count = 2;
             while (list[count]) count++;
             ret = list[count - 2];  /* get the one before the desktop */
         }
         HeapFree( GetProcessHeap(), 0, list );
         break;
 
     case GA_ROOTOWNER:
         if (is_desktop_window( hwnd )) return 0;
         ret = WIN_GetFullHandle( hwnd );
         for (;;)
         {
             HWND parent = GetParent( ret );
             if (!parent) break;
             ret = parent;
         }
         break;
     }
     return ret;
 }
 
 
 /*****************************************************************
  *              SetParent (USER32.@)
  */
 HWND WINAPI SetParent( HWND hwnd, HWND parent )
 {
     HWND full_handle;
     HWND old_parent = 0;
     BOOL was_visible;
     WND *wndPtr;
     BOOL ret;
 
     if (is_broadcast(hwnd) || is_broadcast(parent))
     {
         SetLastError(ERROR_INVALID_PARAMETER);
         return 0;
     }
 
     if (!parent) parent = GetDesktopWindow();
     else if (parent == HWND_MESSAGE) parent = get_hwnd_message_parent();
     else parent = WIN_GetFullHandle( parent );
 
     if (!IsWindow( parent ))
     {
         SetLastError( ERROR_INVALID_WINDOW_HANDLE );
         return 0;
     }
 
     /* Some applications try to set a child as a parent */
     if (IsChild(hwnd, parent))
     {
         SetLastError( ERROR_INVALID_PARAMETER );
         return 0;
     }
 
     if (!(full_handle = WIN_IsCurrentThread( hwnd )))
         return (HWND)SendMessageW( hwnd, WM_WINE_SETPARENT, (WPARAM)parent, 0 );
 
     /* Windows hides the window first, then shows it again
      * including the WM_SHOWWINDOW messages and all */
     was_visible = ShowWindow( hwnd, SW_HIDE );
 
     wndPtr = WIN_GetPtr( hwnd );
     if (!wndPtr || wndPtr == WND_OTHER_PROCESS || wndPtr == WND_DESKTOP) return 0;
 
     SERVER_START_REQ( set_parent )
     {
         req->handle = wine_server_user_handle( hwnd );
         req->parent = wine_server_user_handle( parent );
         if ((ret = !wine_server_call( req )))
         {
             old_parent = wine_server_ptr_handle( reply->old_parent );
             wndPtr->parent = parent = wine_server_ptr_handle( reply->full_parent );
         }
 
     }
     SERVER_END_REQ;
     WIN_ReleasePtr( wndPtr );
     if (!ret) return 0;
 
     USER_Driver->pSetParent( full_handle, parent, old_parent );
 
     /* SetParent additionally needs to make hwnd the topmost window
        in the x-order and send the expected WM_WINDOWPOSCHANGING and
        WM_WINDOWPOSCHANGED notification messages.
     */
     SetWindowPos( hwnd, HWND_TOP, 0, 0, 0, 0,
                   SWP_NOACTIVATE | SWP_NOMOVE | SWP_NOSIZE | (was_visible ? SWP_SHOWWINDOW : 0) );
     /* FIXME: a WM_MOVE is also generated (in the DefWindowProc handler
      * for WM_WINDOWPOSCHANGED) in Windows, should probably remove SWP_NOMOVE */
 
     return old_parent;
 }
 
 
 /*******************************************************************
  *              IsChild (USER32.@)
  */
 BOOL WINAPI IsChild( HWND parent, HWND child )
 {
     HWND *list = list_window_parents( child );
     int i;
     BOOL ret;
 
     if (!list) return FALSE;
     parent = WIN_GetFullHandle( parent );
     for (i = 0; list[i]; i++) if (list[i] == parent) break;
     ret = list[i] && list[i+1];
     HeapFree( GetProcessHeap(), 0, list );
     return ret;
 }
 
 
 /***********************************************************************
  *              IsWindowVisible (USER32.@)
  */
 BOOL WINAPI IsWindowVisible( HWND hwnd )
 {
     HWND *list;
     BOOL retval = TRUE;
     int i;
 
     if (!(GetWindowLongW( hwnd, GWL_STYLE ) & WS_VISIBLE)) return FALSE;
     if (!(list = list_window_parents( hwnd ))) return TRUE;
     if (list[0])
     {
         for (i = 0; list[i+1]; i++)
             if (!(GetWindowLongW( list[i], GWL_STYLE ) & WS_VISIBLE)) break;
         retval = !list[i+1] && (list[i] == GetDesktopWindow());  /* top message window isn't visible */
     }
     HeapFree( GetProcessHeap(), 0, list );
     return retval;
 }
 
 
 /***********************************************************************
  *           WIN_IsWindowDrawable
  *
  * hwnd is drawable when it is visible, all parents are not
  * minimized, and it is itself not minimized unless we are
  * trying to draw its default class icon.
  */
 BOOL WIN_IsWindowDrawable( HWND hwnd, BOOL icon )
 {
     HWND *list;
     BOOL retval = TRUE;
     int i;
     LONG style = GetWindowLongW( hwnd, GWL_STYLE );
 
     if (!(style & WS_VISIBLE)) return FALSE;
     if ((style & WS_MINIMIZE) && icon && GetClassLongPtrW( hwnd, GCLP_HICON ))  return FALSE;
 
     if (!(list = list_window_parents( hwnd ))) return TRUE;
     if (list[0])
     {
         for (i = 0; list[i+1]; i++)
             if ((GetWindowLongW( list[i], GWL_STYLE ) & (WS_VISIBLE|WS_MINIMIZE)) != WS_VISIBLE)
                 break;
         retval = !list[i+1] && (list[i] == GetDesktopWindow());  /* top message window isn't visible */
     }
     HeapFree( GetProcessHeap(), 0, list );
     return retval;
 }
 
 
 /*******************************************************************
  *              GetTopWindow (USER32.@)
  */
 HWND WINAPI GetTopWindow( HWND hwnd )
 {
     if (!hwnd) hwnd = GetDesktopWindow();
     return GetWindow( hwnd, GW_CHILD );
 }
 
 
 /*******************************************************************
  *              GetWindow (USER32.@)
  */
 HWND WINAPI GetWindow( HWND hwnd, UINT rel )
 {
     HWND retval = 0;
 
     if (rel == GW_OWNER)  /* this one may be available locally */
     {
         WND *wndPtr = WIN_GetPtr( hwnd );
         if (!wndPtr)
         {
             SetLastError( ERROR_INVALID_HANDLE );
             return 0;
         }
         if (wndPtr == WND_DESKTOP) return 0;
         if (wndPtr != WND_OTHER_PROCESS)
         {
             retval = wndPtr->owner;
             WIN_ReleasePtr( wndPtr );
             return retval;
         }
         /* else fall through to server call */
     }
 
     SERVER_START_REQ( get_window_tree )
     {
         req->handle = wine_server_user_handle( hwnd );
         if (!wine_server_call_err( req ))
         {
             switch(rel)
             {
             case GW_HWNDFIRST:
                 retval = wine_server_ptr_handle( reply->first_sibling );
                 break;
             case GW_HWNDLAST:
                 retval = wine_server_ptr_handle( reply->last_sibling );
                 break;
             case GW_HWNDNEXT:
                 retval = wine_server_ptr_handle( reply->next_sibling );
                 break;
             case GW_HWNDPREV:
                 retval = wine_server_ptr_handle( reply->prev_sibling );
                 break;
             case GW_OWNER:
                 retval = wine_server_ptr_handle( reply->owner );
                 break;
             case GW_CHILD:
                 retval = wine_server_ptr_handle( reply->first_child );
                 break;
             }
         }
     }
     SERVER_END_REQ;
     return retval;
 }
 
 
 /*******************************************************************
  *              ShowOwnedPopups (USER32.@)
  */
 BOOL WINAPI ShowOwnedPopups( HWND owner, BOOL fShow )
 {
     int count = 0;
     WND *pWnd;
     HWND *win_array = WIN_ListChildren( GetDesktopWindow() );
 
     if (!win_array) return TRUE;
 
     while (win_array[count]) count++;
     while (--count >= 0)
     {
         if (GetWindow( win_array[count], GW_OWNER ) != owner) continue;
         if (!(pWnd = WIN_GetPtr( win_array[count] ))) continue;
         if (pWnd == WND_OTHER_PROCESS) continue;
         if (fShow)
         {
             if (pWnd->flags & WIN_NEEDS_SHOW_OWNEDPOPUP)
             {
                 WIN_ReleasePtr( pWnd );
                 /* In Windows, ShowOwnedPopups(TRUE) generates
                  * WM_SHOWWINDOW messages with SW_PARENTOPENING,
                  * regardless of the state of the owner
                  */
                 SendMessageW(win_array[count], WM_SHOWWINDOW, SW_SHOWNORMAL, SW_PARENTOPENING);
                 continue;
             }
         }
         else
         {
             if (pWnd->dwStyle & WS_VISIBLE)
             {
                 WIN_ReleasePtr( pWnd );
                 /* In Windows, ShowOwnedPopups(FALSE) generates
                  * WM_SHOWWINDOW messages with SW_PARENTCLOSING,
                  * regardless of the state of the owner
                  */
                 SendMessageW(win_array[count], WM_SHOWWINDOW, SW_HIDE, SW_PARENTCLOSING);
                 continue;
             }
         }
         WIN_ReleasePtr( pWnd );
     }
     HeapFree( GetProcessHeap(), 0, win_array );
     return TRUE;
 }
 
 
 /*******************************************************************
  *              GetLastActivePopup (USER32.@)
  */
 HWND WINAPI GetLastActivePopup( HWND hwnd )
 {
     HWND retval = hwnd;
 
     SERVER_START_REQ( get_window_info )
     {
         req->handle = wine_server_user_handle( hwnd );
         if (!wine_server_call_err( req )) retval = wine_server_ptr_handle( reply->last_active );
     }
     SERVER_END_REQ;
     return retval;
 }
 
 
 /*******************************************************************
  *           WIN_ListChildren
  *
  * Build an array of the children of a given window. The array must be
  * freed with HeapFree. Returns NULL when no windows are found.
  */
 HWND *WIN_ListChildren( HWND hwnd )
 {
     if (!hwnd)
     {
         SetLastError( ERROR_INVALID_WINDOW_HANDLE );
         return NULL;
     }
     return list_window_children( 0, hwnd, NULL, 0 );
 }
 
 
 /*******************************************************************
  *              EnumWindows (USER32.@)
  */
 BOOL WINAPI EnumWindows( WNDENUMPROC lpEnumFunc, LPARAM lParam )
 {
     HWND *list;
     BOOL ret = TRUE;
     int i;
 
     USER_CheckNotLock();
 
     /* We have to build a list of all windows first, to avoid */
     /* unpleasant side-effects, for instance if the callback */
     /* function changes the Z-order of the windows.          */
 
     if (!(list = WIN_ListChildren( GetDesktopWindow() ))) return TRUE;
 
     /* Now call the callback function for every window */
 
     for (i = 0; list[i]; i++)
     {
         /* Make sure that the window still exists */
         if (!IsWindow( list[i] )) continue;
         if (!(ret = lpEnumFunc( list[i], lParam ))) break;
     }
     HeapFree( GetProcessHeap(), 0, list );
     return ret;
 }
 
 
 /**********************************************************************
  *              EnumThreadWindows (USER32.@)
  */
 BOOL WINAPI EnumThreadWindows( DWORD id, WNDENUMPROC func, LPARAM lParam )
 {
     HWND *list;
     int i;
 
     USER_CheckNotLock();
 
     if (!(list = list_window_children( 0, GetDesktopWindow(), NULL, id ))) return TRUE;
 
     /* Now call the callback function for every window */
 
     for (i = 0; list[i]; i++)
         if (!func( list[i], lParam )) break;
     HeapFree( GetProcessHeap(), 0, list );
     return TRUE;
 }
 
 
 /***********************************************************************
  *              EnumDesktopWindows   (USER32.@)
  */
 BOOL WINAPI EnumDesktopWindows( HDESK desktop, WNDENUMPROC func, LPARAM lparam )
 {
     HWND *list;
     int i;
 
     USER_CheckNotLock();
 
     if (!(list = list_window_children( desktop, 0, NULL, 0 ))) return TRUE;
 
     for (i = 0; list[i]; i++)
         if (!func( list[i], lparam )) break;
     HeapFree( GetProcessHeap(), 0, list );
     return TRUE;
 }
 
 
 /**********************************************************************
  *           WIN_EnumChildWindows
  *
  * Helper function for EnumChildWindows().
  */
 static BOOL WIN_EnumChildWindows( HWND *list, WNDENUMPROC func, LPARAM lParam )
 {
     HWND *childList;
     BOOL ret = FALSE;
 
     for ( ; *list; list++)
     {
         /* Make sure that the window still exists */
         if (!IsWindow( *list )) continue;
         /* Build children list first */
         childList = WIN_ListChildren( *list );
 
         ret = func( *list, lParam );
 
         if (childList)
         {
             if (ret) ret = WIN_EnumChildWindows( childList, func, lParam );
             HeapFree( GetProcessHeap(), 0, childList );
         }
         if (!ret) return FALSE;
     }
     return TRUE;
 }
 
 
 /**********************************************************************
  *              EnumChildWindows (USER32.@)
  */
 BOOL WINAPI EnumChildWindows( HWND parent, WNDENUMPROC func, LPARAM lParam )
 {
     HWND *list;
     BOOL ret;
 
     USER_CheckNotLock();
 
     if (!(list = WIN_ListChildren( parent ))) return FALSE;
     ret = WIN_EnumChildWindows( list, func, lParam );
     HeapFree( GetProcessHeap(), 0, list );
     return ret;
 }
 
 
 /*******************************************************************
  *              AnyPopup (USER.52)
  */
 BOOL16 WINAPI AnyPopup16(void)
 {
     return AnyPopup();
 }
 
 
 /*******************************************************************
  *              AnyPopup (USER32.@)
  */
 BOOL WINAPI AnyPopup(void)
 {
     int i;
     BOOL retvalue;
     HWND *list = WIN_ListChildren( GetDesktopWindow() );
 
     if (!list) return FALSE;
     for (i = 0; list[i]; i++)
     {
         if (IsWindowVisible( list[i] ) && GetWindow( list[i], GW_OWNER )) break;
     }
     retvalue = (list[i] != 0);
     HeapFree( GetProcessHeap(), 0, list );
     return retvalue;
 }
 
 
 /*******************************************************************
  *              FlashWindow (USER32.@)
  */
 BOOL WINAPI FlashWindow( HWND hWnd, BOOL bInvert )
 {
     WND *wndPtr;
 
     TRACE("%p\n", hWnd);
 
     if (IsIconic( hWnd ))
     {
         RedrawWindow( hWnd, 0, 0, RDW_INVALIDATE | RDW_ERASE | RDW_UPDATENOW | RDW_FRAME );
 
         wndPtr = WIN_GetPtr(hWnd);
         if (!wndPtr || wndPtr == WND_OTHER_PROCESS || wndPtr == WND_DESKTOP) return FALSE;
         if (bInvert && !(wndPtr->flags & WIN_NCACTIVATED))
         {
             wndPtr->flags |= WIN_NCACTIVATED;
         }
         else
         {
             wndPtr->flags &= ~WIN_NCACTIVATED;
         }
         WIN_ReleasePtr( wndPtr );
         return TRUE;
     }
     else
     {
         WPARAM wparam;
 
         wndPtr = WIN_GetPtr(hWnd);
         if (!wndPtr || wndPtr == WND_OTHER_PROCESS || wndPtr == WND_DESKTOP) return FALSE;
         hWnd = wndPtr->hwndSelf;  /* make it a full handle */
 
         if (bInvert) wparam = !(wndPtr->flags & WIN_NCACTIVATED);
         else wparam = (hWnd == GetForegroundWindow());
 
         WIN_ReleasePtr( wndPtr );
         SendMessageW( hWnd, WM_NCACTIVATE, wparam, 0 );
         return wparam;
     }
 }
 
 /*******************************************************************
  *              FlashWindowEx (USER32.@)
  */
 BOOL WINAPI FlashWindowEx( PFLASHWINFO pfwi )
 {
     FIXME("%p\n", pfwi);
     return TRUE;
 }
 
 /*******************************************************************
  *              GetWindowContextHelpId (USER32.@)
  */
 DWORD WINAPI GetWindowContextHelpId( HWND hwnd )
 {
     DWORD retval;
     WND *wnd = WIN_GetPtr( hwnd );
     if (!wnd || wnd == WND_DESKTOP) return 0;
     if (wnd == WND_OTHER_PROCESS)
     {
         if (IsWindow( hwnd )) FIXME( "not supported on other process window %p\n", hwnd );
         return 0;
     }
     retval = wnd->helpContext;
     WIN_ReleasePtr( wnd );
     return retval;
 }
 
 
 /*******************************************************************
  *              SetWindowContextHelpId (USER32.@)
  */
 BOOL WINAPI SetWindowContextHelpId( HWND hwnd, DWORD id )
 {
     WND *wnd = WIN_GetPtr( hwnd );
     if (!wnd || wnd == WND_DESKTOP) return FALSE;
     if (wnd == WND_OTHER_PROCESS)
     {
         if (IsWindow( hwnd )) FIXME( "not supported on other process window %p\n", hwnd );
         return 0;
     }
     wnd->helpContext = id;
     WIN_ReleasePtr( wnd );
     return TRUE;
 }
 
 
 /*******************************************************************
  *              DragDetect (USER32.@)
  */
 BOOL WINAPI DragDetect( HWND hWnd, POINT pt )
 {
     MSG msg;
     RECT rect;
     WORD wDragWidth = GetSystemMetrics(SM_CXDRAG);
     WORD wDragHeight= GetSystemMetrics(SM_CYDRAG);
 
     rect.left = pt.x - wDragWidth;
     rect.right = pt.x + wDragWidth;
 
     rect.top = pt.y - wDragHeight;
     rect.bottom = pt.y + wDragHeight;
 
     SetCapture(hWnd);
 
     while(1)
     {
         while (PeekMessageW( &msg, 0, WM_MOUSEFIRST, WM_MOUSELAST, PM_REMOVE ))
         {
             if( msg.message == WM_LBUTTONUP )
             {
                 ReleaseCapture();
                 return 0;
             }
             if( msg.message == WM_MOUSEMOVE )
             {
                 POINT tmp;
                 tmp.x = (short)LOWORD(msg.lParam);
                 tmp.y = (short)HIWORD(msg.lParam);
                 if( !PtInRect( &rect, tmp ))
                 {
                     ReleaseCapture();
                     return 1;
                 }
             }
         }
         WaitMessage();
     }
     return 0;
 }
 
 /******************************************************************************
  *              GetWindowModuleFileNameA (USER32.@)
  */
 UINT WINAPI GetWindowModuleFileNameA( HWND hwnd, LPSTR module, UINT size )
 {
     WND *win;
     HINSTANCE hinst;
 
     TRACE( "%p, %p, %u\n", hwnd, module, size );
 
     win = WIN_GetPtr( hwnd );
     if (!win || win == WND_OTHER_PROCESS || win == WND_DESKTOP)
     {
         SetLastError( ERROR_INVALID_WINDOW_HANDLE );
         return 0;
     }
     hinst = win->hInstance;
     WIN_ReleasePtr( win );
 
     return GetModuleFileNameA( hinst, module, size );
 }
 
 /******************************************************************************
  *              GetWindowModuleFileNameW (USER32.@)
  */
 UINT WINAPI GetWindowModuleFileNameW( HWND hwnd, LPWSTR module, UINT size )
 {
     WND *win;
     HINSTANCE hinst;
 
     TRACE( "%p, %p, %u\n", hwnd, module, size );
 
     win = WIN_GetPtr( hwnd );
     if (!win || win == WND_OTHER_PROCESS || win == WND_DESKTOP)
     {
         SetLastError( ERROR_INVALID_WINDOW_HANDLE );
         return 0;
     }
     hinst = win->hInstance;
     WIN_ReleasePtr( win );
 
     return GetModuleFileNameW( hinst, module, size );
 }
 
 /******************************************************************************
  *              GetWindowInfo (USER32.@)
  *
  * Note: tests show that Windows doesn't check cbSize of the structure.
  */
 BOOL WINAPI GetWindowInfo( HWND hwnd, PWINDOWINFO pwi)
 {
     if (!pwi) return FALSE;
     if (!IsWindow(hwnd)) return FALSE;
 
     GetWindowRect(hwnd, &pwi->rcWindow);
     GetClientRect(hwnd, &pwi->rcClient);
     /* translate to screen coordinates */
     MapWindowPoints(hwnd, 0, (LPPOINT)&pwi->rcClient, 2);
 
     pwi->dwStyle = GetWindowLongW(hwnd, GWL_STYLE);
     pwi->dwExStyle = GetWindowLongW(hwnd, GWL_EXSTYLE);
     pwi->dwWindowStatus = ((GetActiveWindow() == hwnd) ? WS_ACTIVECAPTION : 0);
 
     pwi->cxWindowBorders = pwi->rcClient.left - pwi->rcWindow.left;
     pwi->cyWindowBorders = pwi->rcWindow.bottom - pwi->rcClient.bottom;
 
     pwi->atomWindowType = GetClass