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  1. #1
    Join Date
    Feb 2003
    Location
    U.K
    Posts
    2

    Question How to apply Date Lock on Program?

    I'd like to discuss different solutions for making my VB application expire after X days. Or maybe not expire, but be crippleware unless registered.

    I'd like to make it so when my application is first run, it prompts for a registration key/code. If the user enters nothing, demo mode is entered, and the program will either expire in X days, or be crippled in some manner. If a proper registration key is entered, the program is fully functional.

    What is the most effective (and SECURE) way to do this? The malicious user shouldn't be able to change the system clock or easily edit the registry or any of that.

    And how will the registration keys work? How will some fail and some work, and how do I determine that?
    Mits

  2. #2
    Join Date
    Sep 2001
    Posts
    49
    Do a search on Google. I have seen the code a few years ago but I have not used it myself. I can't help any further. Check with other VB discussion forums.

  3. #3
    Join Date
    Jan 2003
    Location
    Albany, NY
    Posts
    82
    The best way I've found is to only give limited functionality in a SEPERATE Demo. This ensures that there's no code to crack. And simply supply them with the working version once they've registered.
    Your code can only be as good as your algorithm.

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