public static void RemoveKeyTipAccessedHandler(DependencyObject element, KeyTipAccessedEventHandler handler)
		{
			element.RemoveHandler(KeyTipAccessedEvent, handler);
		}
		public static void RemoveActivatingKeyTipHandler(DependencyObject element, ActivatingKeyTipEventHandler handler)
		{
			element.RemoveHandler(ActivatingKeyTipEvent, handler);
		}