Vagcom help

[MATTYBOY C]

I keep hearing about this vagcom thinggy!! can anyone tell me what it is, what does it do, how much should it cost,where can i get one? a lot of questions i know but i think this is the place to ask,
Thanks in advance

[Uwe@Ross-Tech]

Start here:
http://www.ross-tech.com/vag-com/index.html

-Uwe-