How To Connect to AppServer

Hai,
This is Shaji Kumar VK. I am fresher to OpenEdge and working on how to connect with OpenEdge from C#.NET. Could anybody help me How to programmatically connect to AppServer and call a simple procedure. Please provide me an example, if your able or tell me the URL from where i will get simple and efficient help on it. Thanks in advance.

Regards & Thanks,
Shaji Kumar.V.K