-connect your camera of some sort to your computer in the USB Plug -then download the driver off the web -then go onto the driver and download the disk.
There are different types of webcams,for example
There a built in web cams
And there are built in webcams
In this link below it will show you a video of a Webcam http://youtubedHHOiAdDWrA
I hope you enjoyed this guide on how to use a web cam