I had software like Garth mentions that came with a Creative webcam. It had all kinds of functions and options.
Never, under any circumstances, consume a laxative and sleeping pill, on the same night
No, I haven't used it myself - it's been a few years since I played around with trying to get a webcam online. Now I just use my security camera system, which has it's own web interface that I can always access through my broadband connection.
~Garth