diff --git a/libs/tk/ydk/gdkwindow.c b/libs/tk/ydk/gdkwindow.c
index 4fd12edaa0..9c9bd9e396 100644
--- a/libs/tk/ydk/gdkwindow.c
+++ b/libs/tk/ydk/gdkwindow.c
@@ -159,6 +159,7 @@ typedef struct {
   int dx, dy; /* The amount that the source was moved to reach dest_region */
 } GdkWindowRegionMove;
 
+void (*_gdk_modal_motify)(GdkWindowModalNotify) = 0;
 
 /* Global info */
 
@@ -11408,6 +11409,11 @@ gdk_window_get_height (GdkWindow *window)
   return height;
 }
 
+void
+gdk_window_set_modal_notify (void (*modal_notify)(GdkWindow*,gboolean))
+{
+	_gdk_modal_motify = modal_notify;
+}
 
 #define __GDK_WINDOW_C__
 #include "gdkaliasdef.c"
diff --git a/libs/tk/ydk/quartz/gdkwindow-quartz.c b/libs/tk/ydk/quartz/gdkwindow-quartz.c
index 4cab5aab9a..5dac19923a 100644
--- a/libs/tk/ydk/quartz/gdkwindow-quartz.c
+++ b/libs/tk/ydk/quartz/gdkwindow-quartz.c
@@ -2389,6 +2389,9 @@ gdk_window_set_modal_hint (GdkWindow *window,
       !WINDOW_IS_TOPLEVEL (window))
     return;
 
+  if (_gdk_modal_notify) {
+	  _gdk_modal_notify (window, modal);
+  }
   /* FIXME: Implement */
 }
 
diff --git a/libs/tk/ydk/ydk/gdk/gdkinternals.h b/libs/tk/ydk/ydk/gdk/gdkinternals.h
index 289878b1d4..39c6e25ec4 100644
--- a/libs/tk/ydk/ydk/gdk/gdkinternals.h
+++ b/libs/tk/ydk/ydk/gdk/gdkinternals.h
@@ -709,6 +709,8 @@ void       _gdk_offscreen_window_new                 (GdkWindow     *window,
 void _gdk_image_exit  (void);
 void _gdk_windowing_exit (void);
 
+extern void (*_gdk_modal_motify)(GdkWindowModalNotify);
+
 G_END_DECLS
 
 #endif /* __GDK_INTERNALS_H__ */
diff --git a/libs/tk/ydk/ydk/gdk/gdkwindow.h b/libs/tk/ydk/ydk/gdk/gdkwindow.h
index 572797b955..d060ba0e0a 100644
--- a/libs/tk/ydk/ydk/gdk/gdkwindow.h
+++ b/libs/tk/ydk/ydk/gdk/gdkwindow.h
@@ -406,7 +406,7 @@ void	      gdk_window_move_region           (GdkWindow       *window,
 						gint             dy);
 gboolean      gdk_window_ensure_native        (GdkWindow       *window);
 
-/* 
+/*
  * This allows for making shaped (partially transparent) windows
  * - cool feature, needed for Drag and Drag for example.
  *  The shape_mask can be the mask
@@ -508,6 +508,9 @@ gboolean      gdk_window_get_modal_hint   (GdkWindow       *window);
 void          gdk_window_set_modal_hint   (GdkWindow       *window,
                                            gboolean         modal);
 
+typedef void (*GdkWindowModalNotify)(GdkWindow*,gboolean);
+void          gdk_window_set_modal_notify (GdkWindowModalNotify);
+
 void gdk_window_set_skip_taskbar_hint (GdkWindow *window,
                                        gboolean   skips_taskbar);
 void gdk_window_set_skip_pager_hint   (GdkWindow *window,