The latest version, 1.25, was released July 6 2008.
Download QuickCamLib. Usage of the software is 'restricted' by the BSD license. Open the included License.txt file for the exact details.
It has been verified the library works with the following devices: QuickCam® Pro 4000, QuickCam® Sphere AF, QuickCam® Sphere MP, QuickCam® Communicate STX.
Pretty much any recent USB webcam should work, let me know if you run into any trouble. I am still working on this page, check the download, there is
an example program (SharpCam) in there.