Applying security in Application.

Hello Everybody,
I have a small problem. Any one having a solution, please suggest and give. I will be very thankful.
It's about Registry keys and defining our own secret key.

How to make a designed application in visual basic 6.0 using registry keys. Is there any method of using any registry key and defining our own clause with any secret key.


Since any user can copy the folder containing required files and use it. How to prevent from this or make this not happen by any user.

Please forward if you have the solution to this practical concept.
Thanks.