>anybody here knows how i can code my program to prevent the program from being copied or used by unauthorized people? I would appreciate a sample coding very very much. thanks in advance.

Hi Susan. Here are some leads:

1) Craig's website has two articles. One on limiting the number of users and another on making a demo. http://members.home.net/foxpro/kb/index.htm

2) In the files section under "classes" is a file called "AntiPirate Protection Class". Not sure exactly what it does

3) You could get a dongle

4) http://www.componentsource.com/ has a few tools