Dial-up connection detection

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 ?

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 Flag,0); 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(); } } }

1 Reply

Know the answer? Post it — somebody with the same question will find it here.

Administrator23y ago
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 Flag,0); 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(); } } }
+1