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Regards,
Tom Ogilvy

"ExcelMonkey " wrote in message
...
Does anyone know how to write a sub routine that limits the use of an
excel spreadsheet with VBA? That is, I want to give trial versions of
my spreadsheet to people and control the number of times or time
periods they use it. Example, you can only use this file for free from
Jan1 to Jan 10 then you have to buy the registered version. Or you can
only open this file 3 times for free and then you have pay for the
registered verison.

Yes I know that security is not good. But I still want to understand
how to TRY and do it

1) Define trial period (i.e. date of file expiration)
2) Define trial usage (i.e. # of file opens)

Thanks


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