>I'm trying to find a way to be sure that only one instance of my foxpro application is running. So when i start the application a second time, i want to show the user a message.
>
>Ok I know there is an api call witch compares the captions of running application, but I don't whant to use that because an other application or a mail message can have the same caption.
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>Thanks.
>
Gerben,

Three ways come to mind. One is to set up the application as a DDE Server. What you'd do is use DDEInitiate() to check for an existing instance, and if it was found, terminate the second. I believe you'll find something in the download section on this

Another way would be to use the CreateEvent API call. Ed Rauh demonstrates this technique in one of his FAQs, I believe.

Finally, you could use the CreateMutex() API call. I demonstrated this technique in the November, 1998 issue of FoxPro Advisor.