How to create different license keys for my Product

Question

Hi Friends,

I have created a windows application using c#.net in Visual Studio 2008 and also created a setup for it and now i want to distribute it to my customers. So to overcome the problem of copyright or piracy, i wanted to create license keys for my product, so please help me how can i achieve this to my product.

For example: When we are installing windows os on any pc it asks for a key right? I want this functionality to my project. Please help me....

Thanks in advance.