keep track of how many friends clicked "Like"

Question

I want to develop an application (Facebook) that is able to invite friends to a fan page and keep track of how many friends (among those invited), clicked "Like" and complete the registration within the application.

Answer 1

If you look at the Facebook Dev page here is information pertaining to your request https://developers.facebook.com/docs/reference/plugins/like/ . Hope it is helpful!