In Windows 7 whenever the internet access gets lost, the network indicator turns yellow. I want to get this status in my software and set an alarm whenever the internet connecti
In the Windows API Code Pack there is a NetworkManager class that gets you both IsConnected and IsConnectedToInternet. Comes with some useful samples too. If you want to detect a change in status, do not poll - there are .NET events you can add handlers for just like adding a click handler.
Also see Detect Internet V. local lan connection, An elegant / simple way to check whether internet is available or not, I need a event to detect Internet connect/disconnect, etc.