public static void AddKeyTipAccessedHandler(DependencyObject element, KeyTipAccessedEventHandler handler)
		{
			element.AddHandler(KeyTipAccessedEvent, handler);
		}
		public static void AddActivatingKeyTipHandler(DependencyObject element, ActivatingKeyTipEventHandler handler)
		{
			element.AddHandler(ActivatingKeyTipEvent, handler);
		}