>FWIW, I've seen this same behavior in Outlook, NotePad, and other "standard" windows applications. It's something in Windows, not just in VFP.

Hmmm . . . that's interesting. I don't remember seeing it in any other apps (I use Outlook all the time) and I was thinking it had to do with the non-standard way in which VFP handles windows. Are you saying you see this exact behavior where the button will depress/undepress as you move the mouse back and forth over it (without clicking)?