>Brien,
>
>Thanks for the tips....I can think of a number of ways that your idea can be used. And it sounds relatively easy to do.
>
>Thanks again,
>
>Bill
>
>>>Has anyone ever run across a way to determine if an application is already running and prevent it from being started a 2nd or 3rd or .... time. We have some users that forget that they have minimized an app and start it again...causes some interesting problems.
>>>
>>>Thanks,
>>>
>>>Bill
>>
>>Bill,
>>
>>Probably the best way to handle this is to add a table to your database that keeps track of which users (by SYS(0)) are on your system. ie. Users (Username C(100))
>>
>>Set it up so that when the application starts, the table is searched for a record matching the SYS(0) of the machine. If the record's not found, then you can just add the record. The key to preventing further access is to lock the matching (or new) record. If the record can't be locked, that would indicate that the machine already has an instance of the application running.

In addition you may want to check CreateEvent August 25, 2000 04:44 API #12710 by Ed Rauh.