dcb.DCBlength = sizeof(DCB);
GetCommState (m_hComport, &dcb); // ger current serialport settings
dcb.BaudRate = 38400; // set speed
dcb.DCBlength = sizeof(DCB);
GetCommState (m_hComport, &dcb); // ger current serialport settings
dcb.BaudRate = 38400; // set speed