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How to obscure functionality
I've got a spreadsheet which I'm about to start leasing to paying
users. I want to create a fully functional demo version that will lock up after a period and have its formulas and especially its VBA code obscured and protected against copying. Knowing how easy it is to crack the password on spreadsheets, I know that just putting a standard password on it isn't going to do much. So what are my options? I know about time bombing, and about inserting various date sensitive bugs in cell formulas =if(today()bombdate,cause error,formula), but I want to make it harder to copy. I'm most concerned about hiding the VBA. If I can lock up the VBA somehow so the code can't be viewed or copied that would protect the most valuable parts of the intellectual property. Travis |
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