Event when network changes

Hello all,

I am trying to figure how to use an activex callback when the computers(windows 7) network connection changes.

I am able to access and use properties of the NETWORKLIST.INetworkListManager class but I am not able to get the Reg Event Callback to work for NETWORKLIST.INetworkListManager.NetworkConnectivityChanged.

Does anyone have experience with this class or more ActiveX knowledge to get this working?

Perhaps there is another more commonly used method to see network changes without polling?

I hope I have provided enough details to get some help. Thank you for your time.