Can I use a global variable to stop a while loop in a subvi?

[DianeS]

Well, if Ben tells you you're wrong, then there's nothing to do but admit you're wrong.  I bow to the master.

I will still use notifiers instead of globals, though.     I do use AEs a lot, but not for things like button presses.  Hmm.

[SteveChandler]

Ben mentioned Action Engines with wrappers. Here is an example of how to do that.