Using DirectShow and Multicasting Socket  Download: DirectShow Video Multicasting Project

Outside article from Code Project Article: Outside Article in The Code Project

Using Open H.323 Library  Download: Voice Chat Using Open H.323  Download: The Source Code of The OpenH.323 Library

Using TAPI3 to Create P2P Audio Chatting System  Download: TAPI 3 P2P Voice Chat Example

Using avicap32.dll and Streaming Classes in .NET Article Link:  Download: Simple P2P Video Conferencing

Using RTP Managed Classes in .NET to Create Simple Video Conferencing Download