WOW! Thanks for such a simple solution. I was using fread to look for a signature in the exe's per David and Georges suggestions. I also started to look for a signature in an "APP" but have yet to find something. In any event, your suggestion is great too. Thanks again.

-Isaac


>Hi Issac,
>
>>I have an app allows the user to schedule an app to run. I allow the user to select the file to run with GetFile(). Does anyone know of a way to make sure the file selected (I only allow selection of "app" or "exe") is a VFP app?
>
>Try
>
> SET PROCEDURE TO bla.EXE ADDITIVE
>
>If it returns an error, it's not a VFP exe. It will also tell you whether it's a VFP exe, but compiled in the wrong version.
>
>
>Christof