How about using a timer event to check for the existence of a file in a common area. If it exists, politely kick them out of the application after letting them know why and after a grace period :)

>Has someone found out how to kick someone out of a program (EXE, APPP)?
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>This is a problem I have been wondering about for a long time. It never really bothered me until I had to run upstairs when I made a change to the program to tell everyone to log out of the program and then run back downstairs to compile and try it. I'm getting too old for this.