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Use a simple API function InternetGetConnectedState, to return a boolean variable. using System ; using System.Runtime ; using System.Runtime.InteropServices ; public class InternetCS { //Creating the extern function... [DllImport("wininet.dll")] private extern static bool InternetGetConnectedState( out int Description, int ReservedValue ) ; //Creating a function that uses the API function... public static bool IsConnectedToInternet( ) { int Desc ; return InternetGetConnectedState( out Desc, 0 ) ; } } blank