Display list of all database servers on the network

Hi!
First of all, I don't know if this msg is in the right place. I was contemplating between this board and the ADO.NET board.

But anyway, my problem is like this:

Those of you who user SQL Server 2000 would know that there is a combo box in SQL Service Manager that shows you the names of all the database servers on the network. I want to use this same feature in an application of mine that I'm programming in C#. How do I get this list of database servers? Do I have to import a dll?

Thanks in advance for any form of help offered.