>I need to make sure that the only EXE running in Windows 95 or NT, is the on I made. How can I prevent my application from running when other aplicattions are running.

This is pretty difficult task. Windows creates a lot of different windows for things like mouse drivers, the program manager, OLE, etc. This would make something like checking what windows existed at startup a difficult proposition. However, if you knew in advance what programs you didn''t want to be running when your application started, you could use something like Is_Run in the download section to check for their presence.