>I need to prevent certain VFP Functions to run.
>Or make them to run my own function instead.~
>
>Any ideas ?
>Thanks

I hope you are aware of the huge security hole you leave open when you allow your clients to write code which can be executed? Christof Wollenhaupt has held several sessions on this topic, I believe it is also covered in his white paper http://www.foxpert.com/docs/security.en.htm