Developing a customised bandwidth meter

[GrimStoner]

Yo

I'm thinking of developing a custom bandwidth meter for our company. Our clients use GPRS/3G/EDGE/HSDPA modems, and are currently using a version of Magitime.

Anybody have an idea where to start? I'm using VB 2008, .Net 3.5. I'm guessing I'll need to access some Windows API to check for a connection, and then poll it periodically to get the bandwidth that passed through a connection.