You could make your application the shell in win.ini. This way explorer is never even loaded. I posted details on doing this on 08/24/1998. You can use the calendar icon to find it, or use the search. The title of the thread was "Restricting Other Applications"

>Is there a way to keep the user running a VFP application EXE from moving to other programs or start any other, or activating the task bar with the Task bar key or by pressing Alt+Tab.
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>Thanks