You do know what the Me Gusta face means, right? It means I like.

That point aside, what do you want to do? Would this be infecting people with Keyloggers, Using a Keylogger on your own computer to detect RAT-ters or find what other users are doing on it, spreading a Keylogger through USB, infecting people over E-Mail, or one of the other possible options? If you want to know about a topic please at least look up a little bit about it on Google and have your question be more thorough compared to "How Do i Keylog? Well Tell Me"

So, if you could add a little more descriptiveness to your question it would be great, and then I might be able to help you