Best VNC

Hi, my friend wants me to get control of his computer to see if I can fix some of the problems that he has in his computer since he is a newbie and I told him I could use a VNC program but what I want to know is wich is the best VNC program and how does it work?

Thanx

http://www.uk.research.att.com/vnc/index.html

This is a good, FREE, VNC program. But there is something that I don't understand...If you don't know much about VNC, why are you trying to use it to control someone's PC? Why not just go to your friend's house and work on it?

I believe this is where you can find VNC

http://www.uk.research.att.com/vnc/index.html