Reacting to StylusDown in control's UI?

Question

I'm building a touch screen application in WPF and I'm wanting to show a change in UI when the user presses a button with their finger/stylus. Currently you only get a flicker of UI change once the finger is released but nothing before that.

I've been trying to hook up triggers and/or eventtriggers in the button template to things like stylusdown and touchdown but to no avail.

I've hooked up some console writes on events attached to a button and they appear in the following order:

• StylusDown
• StylusButtonDown
• TouchDown
• StylusUp
• StylusButtonUp
• Click

All of which firing at the same time when the finger is lifted from the screen. (TouchUp doesn't seem to fire at all).

Any ideas on how I could begin to capture a finger pressing onto a button in the template so I can give the user some idea that they are actually pressing a button?