>Hi all,
>
>I have a naughty user who could manipulate data in Visual Foxpro and actually I have uninstall it but he installed it again and I can't stand it anymore, so I want to disable the Visual Foxpro in his PC quitely without letting him know by putting some code in the main program and delete some files that make the Visual foxpro error when open it, anyone knows what files ?

Many solutions were given to you. Here's another take on this problem.

You could also add a checksum field to one or more tables. The value for that field would be computed by the application. If the data is changed outside the application then the checksum value would'nt be good no more. If this is the case then you stop the application from running.

I know that this sollution alone is'nt perfect but I think that a mixture of the solutions that were given to you would probably give you the security that you're looking for.