HANDLE hport;
DCB dcb1;

main()
{
   . . . .
   hport = CreateFile( s_port, GENERIC_READ | GENERIC_WRITE,0,NULL,OPEN_EXISTING,FILE_ATTRIBUTE_NORMAL,0);
   if(hport == INVALID_HANDLE_VALUE) printf( "\nCOM_R hport  WAS NOT OPEN !\n" );
   . . . .
// --- DCB init ----
    dcb1.BaudRate= CBR_9600;
    dcb1.ByteSize=8;
    . . . .    
    . . . .
    succ=SetCommState(hport,&dcb1);
// ------------------------------
    COMMTIMEOUTS CommTimeOutsW;
    GetCommTimeouts(hport, &CommTimeOutsW);    
    . . . .
    CommTimeOutsW.ReadIntervalTimeout    = t_RITT;
    CommTimeOutsW.ReadTotalTimeoutMultiplier = t_RTTM;
    CommTimeOutsW.ReadTotalTimeoutConstant   = t_RTTC;
// ----
    SetCommTimeouts(hport, &CommTimeOutsW);
    succ=SetCommState(hport,&dcb1);

    . . . .

    PurgeComm(hport, PURGE_TXCLEAR | PURGE_RXCLEAR );
    EscapeCommFunction(hport, SETRTS);
    EscapeCommFunction(hport, SETDTR);

    . . . . .
    while( !kbhit() )
    {    real_read = 0x00;
        ReadFile(hport,&RxR_bf[0],50,&real_read,NULL);
        if(real_read > 0)
        {


        } // if read > 0
        else
        {
            printf("*");
        }
        
        real_write = 0x00;

    } // while

    PurgeComm(hport, PURGE_TXCLEAR | PURGE_RXCLEAR );
    CloseHandle(hport);
    return 0;
}