>Is it possible to determine whether a VFP 7 .exe is running more than once on a PC running either W98, ME, 2000 or XP?
>Here is my scenario:
>I don't think I can use a semaphore file without a lot of work because most forms, etc are closing all tables upon release.
>Also, creating a file when the app starts and then deleting it upon exit can result in support calls if the app doesn't terminate gracefully.
>
>TIA.


Alan,

Another solution is to create a "users" dbf file and lock a record in it whenever your app starts. If the next instance of the app the user tries to load can lock the record then no other instance is running. If it cannot lock the record then another instance must already be running. Even if your app crashes it will release the lock on the control record and free it for the next instance.