Hi,
I want to tell you that your advice works correctly. Thank you.

There is only one way that this solution won't work is when the user erase the foxuser.* files. If the user erases those files, the application creates another one and with the one created, the user will be able to print. I try to include the foxuser in my executable but it does not work. Do you know a better way to prevent any users to print?

Salutations.