Do not run yourself into the ground searching for a webcam icon which will allow the use of your built-in laptop camera. You haven't found one because Vista doesn't provide an icon for you to easily access the laptop web cam.
http://social.answers.microsoft.com/Forums/en-US/v istahardware/thread/7586b5b3-6ad3-43bf-8eb5-a70e0c 6f8409