30 Day Trial

This is a discussion on 30 Day Trial within the Windows Programming forums, part of the Platform Specific Boards category; Hello, I am writting a program in MFC. I was needing to know how do I make it so the ...

  1. #1
    Daniel
    Guest

    30 Day Trial

    Hello,

    I am writting a program in MFC. I was needing to know how do I make it so the program stops working after 30 days?

    Thank You In Advance,
    Daniel

  2. #2
    Registered User Dual-Catfish's Avatar
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    Sep 2001
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    There's no one way to do it.. there are many ways I can think of. How about, create a CTime variable, Call CTime::GetDay and record it in a file in the windows directory or the registry IF the file or key doesn't already exist. If it does exist, call CTime::GetDay and compare it to the value in the file.
    Refer to MSDN: http://msdn.microsoft.com/library/de...a3a.GetDay.asp for description and uses of CTime

  3. #3
    Programming is fun, mkay?
    Join Date
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    Post Suggestion

    I've done something like this before. I just learned how to read/write from/to Windows™ registry. I just kept the day information in a registry key.
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  4. #4
    It's full of stars adrianxw's Avatar
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    Registry keys can be read and altered. Use names that seem unconnected with your program, and use just numbers, not obvious date/times. Another popular trick is to store the information in a file and call the file something annoymous.dll and stick it in the Windows directory.

    There are ways around most of the simple methods.
    Wave upon wave of demented avengers march cheerfully out of obscurity unto the dream.

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