public:
FreezePointer() : handle_motion( 0 ), m_function( 0 ), m_data( 0 ){
}
-static gboolean motion_delta( ui::Widget widget, GdkEventMotion *event, FreezePointer* self );
+static gboolean motion_delta( ui::Window widget, GdkEventMotion *event, FreezePointer* self );
void freeze_pointer( ui::Window window, MotionDeltaFunction function, void* data );