I have an application programmed by VB6. It has been packaged. Users can install it and run it at other computers. I want to controll this application's installer with a secure code. Only the secure code checking passed, the installer will continue, otherwise, stop the installation. How can I make it?

I have used WinZip in the past to distribute, with a password needed to unzip the package, and then auto start the installer.

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