From Merlin A.I. Soft:
Merlin Web Cam is a set of three controls for .NET developers. The controls allow you to easily connect to any WIA device (Web cams, digital cameras, and scanners for example). You can have the video output to the Web cam control or to any other panel type control. The controls also include server/client features, so you can create chat or conference applications.
The client/server controls allow multiple connections to a server, authentication (with the ability to override so you can provide your own authentication), optional image encryption before transmission (each connected client receives a different password for encryption).