winex11: Implement DesktopWindowProc driver entry point.

dlls/winex11.drv/init.c

@@ -408,6 +408,7 @@ static const struct user_driver_funcs x11drv_funcs =
     .pUpdateDisplayDevices = X11DRV_UpdateDisplayDevices,
     .pCreateDesktopWindow = X11DRV_CreateDesktopWindow,
     .pCreateWindow = X11DRV_CreateWindow,
+    .pDesktopWindowProc = X11DRV_DesktopWindowProc,
     .pDestroyWindow = X11DRV_DestroyWindow,
     .pFlashWindowEx = X11DRV_FlashWindowEx,
     .pGetDC = X11DRV_GetDC,

dlls/winex11.drv/window.c

@@ -1860,13 +1860,14 @@ BOOL X11DRV_CreateDesktopWindow( HWND hwnd )
 }
 
 
-static WNDPROC desktop_orig_wndproc;
-
 #define WM_WINE_NOTIFY_ACTIVITY WM_USER
 #define WM_WINE_DELETE_TAB      (WM_USER + 1)
 #define WM_WINE_ADD_TAB         (WM_USER + 2)
 
-static LRESULT CALLBACK desktop_wndproc_wrapper( HWND hwnd, UINT msg, WPARAM wp, LPARAM lp )
+/**********************************************************************
+ *           DesktopWindowProc   (X11DRV.@)
+ */
+LRESULT X11DRV_DesktopWindowProc( HWND hwnd, UINT msg, WPARAM wp, LPARAM lp )
 {
     switch (msg)
     {
@@ -1891,7 +1892,7 @@ static LRESULT CALLBACK desktop_wndproc_wrapper( HWND hwnd, UINT msg, WPARAM wp,
         send_notify_message( (HWND)wp, WM_X11DRV_ADD_TAB, 0, 0 );
         break;
     }
-    return desktop_orig_wndproc( hwnd, msg, wp, lp );
+    return NtUserMessageCall( hwnd, msg, wp, lp, 0, NtUserDefWindowProc, FALSE );
 }
 
 /**********************************************************************
@@ -1904,9 +1905,6 @@ BOOL X11DRV_CreateWindow( HWND hwnd )
         struct x11drv_thread_data *data = x11drv_init_thread_data();
         XSetWindowAttributes attr;
 
-        desktop_orig_wndproc = (WNDPROC)NtUserSetWindowLongPtr( hwnd, GWLP_WNDPROC,
-                                                                (LONG_PTR)desktop_wndproc_wrapper, FALSE );
-
         /* create the cursor clipping window */
         attr.override_redirect = TRUE;
         attr.event_mask = StructureNotifyMask | FocusChangeMask;

dlls/winex11.drv/x11drv.h

@@ -218,6 +218,7 @@ extern void X11DRV_UpdateDisplayDevices( const struct gdi_device_manager *device
                                          BOOL force, void *param ) DECLSPEC_HIDDEN;
 extern BOOL X11DRV_CreateDesktopWindow( HWND hwnd ) DECLSPEC_HIDDEN;
 extern BOOL X11DRV_CreateWindow( HWND hwnd ) DECLSPEC_HIDDEN;
+extern LRESULT X11DRV_DesktopWindowProc( HWND hwnd, UINT msg, WPARAM wp, LPARAM lp ) DECLSPEC_HIDDEN;
 extern void X11DRV_DestroyWindow( HWND hwnd ) DECLSPEC_HIDDEN;
 extern void X11DRV_FlashWindowEx( PFLASHWINFO pfinfo ) DECLSPEC_HIDDEN;
 extern void X11DRV_GetDC( HDC hdc, HWND hwnd, HWND top, const RECT *win_rect,