Can someone tell me how to detect whether or not a PocketPC device has been placed in it's cradle? I have the app made to transfer files both ways, but I'm not sure how to fire the app whenever the handheld has been placed in the cradle.

I've basically been making sure that it's connecting using ActiveSync, but I need to do more of an automated operation than ActiveSync can handle.

I don't know if there is a way to scan USB ports, or to catch an interrupt or something.

Any ideas appreciated.