This is a very very basic example of how to make your program require a serial number. Your serial number can be most anything you like within reason, it will be encrypted. The crypted serial for this basic example will be inside your program. if you want to use this examples serial it is "my serial" It works like this. 1. Your program looks at a registry key value. 2. if the value does not exist or is wrong, the user will be asked for a serial. 3. if serial is correct, the regkey and value wi