Detecting is button is pressed

[Glyph]

How would i go about finding out if a button in a different program was pressed?

Lets say i open a program called " Hearts "

And i want another script to detect if i clicked " Pass Left "

How would i get that script to make a message box saying " hey " after i clicked it?

-Woops... typo in Topic!-

Edited December 21, 2006 by backstabbed