Dial-up connection detection

Question

How can I make an assemply (exe) with c#.net resides in system tray waiting for dial-up connection (as an example displays message box when connection to internet succeeded). I found that to place it on system tray I must use notifyIcon class to detect connection there is proberty called network in system.Windows.Forms.SystemInformation. Network but at all times it returns True ??? How kan I detect connection please ?

Administrator · Answer

You can try somrthing like this: using System; using System.Runtime.InteropServices; namespace InetStateTest { public class ConnectionState { private enum ConnectionStateEnum { //Local system has a valid connection to the Internet but it might or might not be currently connected. ConnectionConfigured = 64 //Local system uses a local area network to connect to the Internet. ConnectionLan = 2 //Local system uses a modem to connect to the Internet. ConnectionModem = 1 //No longer used. ConnectionModemBusy = 8 //Local system is in offline mode. ConnectionOffline = 32 //Local system uses a proxy server to connect to the Internet. ConnectionProxy = 4 //Local system has RAS installed. RasInstalled = 16 } private class Win32 { [DllImport(Wininet.dll CharSet=CharSet.Auto)] public static extern int InternetGetConnectedState(out int Flag int Reserved); } private static int GetConnectionFlag() { int Flag; Win32.InternetGetConnectedState(out Flag0); return Flag; } public static bool IsModemConnected() { return ((GetConnectionFlag() & (int)ConnectionStateEnum.ConnectionModem)==0) ? false : true; } } public class StartUp { public static void Main() { if (ConnectionState.IsModemConnected()) { Console.WriteLine(Connected); } else { Console.WriteLine(Not connected); } Console.ReadLine(); } } }