well you have to buy one first then turn the cam on and then if you want to connect it to your computer with the connection cord and thats basicaly it
WRONG! That's how to use a web cam, you don't need one to use CamStudio though because CamStudio can be used to record what's on the display.
woops got my facts mixed up sorry
http://www.youtube.com/watch?v=Kiug3H3c4gk