How to determine number of copies running?

[qwert]

Like most, I've used _Singleton() to limit to a single executing copy of a script.  But, now, I have the opposite problem, where a user can validly run several copies of the same script ... each with its independent GUI.

Can someone suggest a good way to 1) determine if multiple copies are running and, if there are, 2) compile a table of "unique handles".   I'd like to be able to use the handles to cycle through the copies ... and even send keys to individual scripts.

I'm trying to get my bearings before I dive into this one.

Thanks for any help.

 

[JohnOne]

ProcessList()
WinList()

[qwert]

Thanks for those.  WinList() works well for my current needs.  I've never worked with either function.

I appreciate your help.