I guess if your not doing this for a class and therefor do not want to reinvent the wheel you should take a look at opencv its a neat open source computer vision library.

I have looked around the net abit more and have not found any other ways to talk to USB in windows without using the windows device foundation. There will be examples included with the foundation...

You may have to write a driver for the USB device or uterlize it as a communications port as say you do with usb serial adapters or things like that.

The windows device foundation SDK has methods...

random annoying note its a representation of an ellipse not a circle.

I know that has no relevance at all, circle just has x, y and r

goto http://gaim.sourceforge.net/ click downloads then download one of the packages that say Gaim 1.4.0 (Source)

Work for yahoo on there messanger development team.

Its not a open sourced application, so your not going to get the sourcecode from anywhere exept for if its leaked.

There are open source...