Kan somebody explain me how a keygen works.
Please let me know



It depends a little on what keygen you are using. But it works something like this:
You must run the keygen and then type your name and the name of your company. You’ll get a registration-code. Then, just run your program and select ‘register’. Now type your name and company again and the code you got from your keyge,n and you will be a registered user.
Good luck!