Hi Daren,
Interesting concept keep people out of games and from making decent use of Excel.
I don't know how to make a macro keep people out of games and other applications,
but I've got a pretty good idea of how to mess up usage of Excel.with a timer.
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HTH,
David McRitchie, Microsoft MVP - Excel [site changed Nov. 2001]
My Excel Pages: http://www.mvps.org/dmcritchie/excel/excel.htm
Search Page: http://www.mvps.org/dmcritchie/excel/search.htm