In a form, there is a Deactivate event. Exactly what this method is for is
hard to determine, because it hardly ever seems to fire. Ok, that's perhaps a little unfair -
it never fires. One thing you certainly can't detect without a bit of
additional work is when the user Alt-Tabs to another application. Detecting this can
be useful, for example, when you the user is performing a drag or you're showing a
pop-up tool window.
Last Updated: 23 November 1998