>Is ther anyone out ther ewho can tell me how to prevent an app from starting twice (By users). A neat way please using temp tables and so on i know but there must be a easier way.

I have a user table with logon ids,passwords (encrypted) etc and it has a field called loggedon. This is useful not only to trap two logons (simply
check and see if is .t. or not and if not turn to .t. when on and to .f. when logs out. Also useful to broadcast messages to all users logged on etc.

HTH