Request for setting serial key while installing my own vb.net project..

I have finished my deployment process for my project in vb.net,but i didn't know how to protect my project. I request you to please tell me the way of serial key setting while installing my project in clients system. Also i have to faced one problem while serial key setting, the serial key displayed on non-editable area. 

But i need like this, if the serial key whatever given during deployment process match with current serial key proceed installing process for my project otherwise aborted.please tell me solution for this problem.