Hi,

The Below Mention Link Contains HELLO WORLD Like Program for Creating Csharp to COM Object..

http://understandavinash.blogspot.com/2009/03/creating-com-from-csharp-and-vbnet.html

U can Download The Source Code from follwing Link

http://www.mediafire.com/?sharekey=5082eaf05dd192a9c79b87b207592a1ce04e75f6e8ebb871