How to test, or make work the internal Web Cam?

Question

I just installed Ubuntu - glad to be done with Vista but I dont knowhow to use LInux. I am trying to figure out if my onboard camera works. There is a post online by someone with my same computer, using HardyHeron (same as me) who says the camera works fine. But I dont know how what program to use to test it, or how to start it, or see if its set up in LInux. Can you point me in the right direction?