Uk Visa Process

But, there are tens of threads with similar topics and answers to such questions, why don't you guys check them out before considering what to post? A lot of people ask the same questions over and over and over again.
  Well, tell your friend to send you an invitation, and then, other things follow.
Click the address bellow, this site will be of help:
http://www.ukvisas.gov.uk/servlet/Front?pagename=OpenMarket/Xcelerate/ShowPage&c=Page&=1018696642519

Note: if the page fails to display, then, copy and paste it on the address bar.