how to open serial com port in mfc

try {
    CSerialPort port;
    port.Open(1, 1200, CSerialPort::NoParity, 8, 
      CSerialPort::OneStopBit, 
      CSerialPort::XonXoffFlowControl);
    char sBuf[] = "This should appear on the serial port";
    port.Write(sBuf, strlen(sBuf));
    port.Flush();
    port.Close();
}
catch (CSerialException* pEx)
{
    TRACE(_T("Handle Exception, Message:%s\n"), 
                      pEx->GetErrorMessage());
    pEx->Delete();
}