I wish to attach a time delay to a mouseover event on a WPF expander I have on my form (xaml supported by VB.NET code behind). This mouseover event essentially triggers the
Use an EventTrigger on the MouseOver event and a Storyboard with a BooleanAnimationUsingKeyFrames instead. In the Timeline of the Storyboard, you could have KeyFrames, so that the animation waits for some time before it affects the properties you want to change.