Hi all:
   I am using VC++ 2005.  When using WinXP this is with SP2 installed.

   I want to detect  network status if it's in connecting or disconnecting.
i try to use the function of "connect" in "winsock2.h" and connect with DNS
Server and Gateway to judge connection status. but the reply is always
"failed to connect".
i can't find what's the problem.
  Is there other function to implement what i want or maybe something need
mofidy in my code?
  THanks all~

my code:

CheckConnection()
{
    //----------------------
    // Initialize Winsock
    WSADATA wsaData;
    int iResult = WSAStartup(MAKEWORD(2,2), &wsaData);
    if (iResult != NO_ERROR)
        AfxMessageBox("Error at WSAStartup()");

    //----------------------
    // Create a SOCKET for connecting to server
    SOCKET ConnectSocket;
    ConnectSocket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
    if (ConnectSocket == INVALID_SOCKET) {
        CString error;
        error.Format("%ld", WSAGetLastError() );
        AfxMessageBox("Error at socket():"+error);
        WSACleanup();
        return  FALSE;
    }

 //----------------------
 // The sockaddr_in structure specifies the address family,
 // IP address, and port of the server to be connected to.
 sockaddr_in clientService;
 clientService.sin_family = AF_INET;
 clientService.sin_addr.s_addr = inet_addr( DNSIp );
 clientService.sin_port = htons( 27015 );

 //----------------------
 // Connect to server.
 if ( connect( ConnectSocket, (SOCKADDR*) &clientService,
sizeof(clientService) ) == SOCKET_ERROR) {
   AfxMessageBox( "Failed to connect.\n" );
   WSACleanup();
   return FALSE;
 }

 AfxMessageBox("Connected to server.\n");
 WSACleanup();
 return TRUE;

    return TRUE;
}