Hello i have written a program that defines and works out very lengthy formulas. I am trying to sell the program for what i believe to be enough money to protect. what i need is to be able to burn it on to a cd the put a time limit on the cd hence the user cannot use it after say 30 days or 5 uses. this would not be drama if i could save the file. e.g just use a counter that is VBA protected. But because it is on a cd it cannot save. i tried an idea of using the current time and date to be checked when excel started and that gave me a protection in which i was satisfied with. however once the 30 days up cd is unusable i could put a password on it to override the time checker however my buyer would have to enter the password every time for use. So basically what i need/want is a program excel/not excel that will limit the usage on the cd and that is full changeable and overidden i was thinking that once the workbook was purchased that the password i give them would then delete a line of code enabling them to save the workbook as it is save protected ? can anyone help ?
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