Activation Key X-fi Mb How Do You Add A Key-code/product Activation Key?

How do you add a key-code/product activation key? - activation key x-fi mb

I will keep a program from using frequent lightning, and then banish to a CD and then selling them as. I wanted to add some kind of warranty on it and although it protects the copy. I, too, but wanted to add to an activation key product, as they have in computer games, or if you install Windows. Please can someone tell me how to go here, dass

Thank you in advance.

Saahil.