Facebook Chat API

Question

Hi, How can I send/receive Facebook Chat messages from my application? its written in .Net, C#.

Answer 1

If you can use C you could use libpurple (GPL) and the pidgin-facebookchat plugin, which is what the pidgin IM program uses to connect to facebook chat

Answer 2

This is an outdated source on the facebook chat protocol:

http://coderrr.wordpress.com/2008/05/06/facebook-chat-api/

Basically it makes use of JSON and Comet to receive messages and a simple POST to post messages. However since that site was made facebook have altered their code significantly. You might need to play around with things or you can try the github page for it, which was last updated Feb 2009: http://github.com/coderrr/facebook_chat