Is there any way other than using the InternetGetConnectedState function to tell whether or not a pc is connected to either the internet or LAN?

I've tried using the InternetGetConnectedState function, but it doesn't seem to be working properly. It detects when my PC is connected to the internet via Dial-up Networking or not, but it doesn't properly detect when my LAN connection is lost. Even if I physically disconnect my LAN cable, the program tells my that I have an active connection via my LAN.

Help would be greatly appreciated!

Jeff