Detect Internet V. local lan connection

Question

Is there anyway with Windows api to detect whether a Windows 7 computer's network connection is an internet connection or a LAN connection without internet access? Windows 7 and Vista indicate this in the network icon (Local only v. Local and Internet), is there anyway to grab that information progammatically?

Answer 1

http://msdn.microsoft.com/en-us/library/aa370750(VS.85).aspx describes the difference between IsConnected and IsConnectedToInternet. Windows 7 only. I don't have a native code sample handy, sorry.

Answer 2

Pinging 4.2.2.2 is a common means of determining if internet connectivity is present.

The story behind this lies here.