Develop web application with Live communication server

Hi everybody, I want to create web application using C# and live communication server. User can set his presence information, view other presence information and send instant messages. How can I start developing in C# web application using live communication server? I doesn't want to use Communicator Web access. If you have any tutorial, then please provide to me. It is very appreciate if you provide some code example. I am beginner in live communication server. I installed live communication server on my pc (Windows 2003 server). Please Help… Thanks, Regards, Hardik