nestat problem

[Snow]

use netstat -a to list all the tcp/ip ports but I always have one port not showing up although through other test I know it's in use because I got 10048 (port in use) error with that port. is there anybody can help me with this?
Thanks very much

[Anodoin]

What "other tests" are you running to show you that that port is in use?

[Snow]

the segment code I used to test the ports is the following:
bool CFmtCGeneratorDlg::PortBusy(short Port)
{
   TRACE(0, "CFmtCGeneratorDlg::PortBusy: start");
   short  CountRead = 0;
   struct sockaddr_in SockAddrStr;
   int m_TestSocket = 0;
   //char PortStr[10];
 
   //_itoa(Port, PortStr,10);
   //TRACE(0, "port = " << PortStr);
   // Create the test socket
   if ((m_TestSocket = socket (AF_INET, SOCK_STREAM, 0)) == INVALID_SOCKET)
   {
      ERROR("CFmtCGeneratorDlg::PortBusy: Test socket create error. Error = " << WSAGetLastError ());
     TRACE(0, "CFmtCGeneratorDlg::PortBusy: done - returning true");
      return true;   // Can't verify so we must assume it's in use
   }
 
   // Bind the listening socket to see if it is already in use
   SockAddrStr.sin_family        = AF_INET;
   SockAddrStr.sin_addr.s_addr   = INADDR_ANY;
   SockAddrStr.sin_port          = htons(Port);
   if (bind (m_TestSocket, (struct sockaddr*)&SockAddrStr, sizeof(SockAddrStr)) == SOCKET_ERROR)
   {
      ERROR("CFmtCGeneratorDlg::PortBusy: Test socket bind Error = " << WSAGetLastError () << " on Port " << Port);
      TRACE(0, "CFmtCGeneratorDlg::PortBusy: done - returning true");
      return true;
   }
   else
   {
       // We verified that the port is not already in use so lets close it
      if (closesocket(m_TestSocket) == SOCKET_ERROR)
      {
         ERROR("CFmtCGeneratorDlg::PortBusy: closesocket error = " << WSAGetLastError () << "return true");   
         TRACE(0, "CFmtCGeneratorDlg::PortBusy: done - returning true");
         return true;
      }      
   } 

   TRACE(0, "CFmtCGeneratorDlg::PortBusy: done - returning false");
   return false;
}

and the result is the following:
CFmtCGeneratorDlg::PortBusy: Test socket bind Error = 10048 on Port 1063
but 1063 was not on the list when I used netstat -a

Thanks for the help very much