>    Could someone suggest me some reading materials in writing OS/2 verions
 >of doors for BBS. Or please show me a piece of code which can be used to
 >replace 'cin' or 'cout' and directly control serial port. Thanks a lot.

Hi, Danny.
You can use DosOpen, DosRead and DosWrite to replace cin, cout.  Also, use
DosDevIOCtl to set modem parameters and line settings, i.e.,  

  DosDevIOCtl(hfCom,IOCTL_ASYNC,ASYNC_SETBAUDRATE,&speed,
              sizeof(USHORT), NULL, NULL, 0L, NULL);

  DosOpen("COM2", &hfCom, &ulAc, 0L, 0, FILE_OPEN,
    OPEN_ACCESS_READWRITE | OPEN_FLAGS_FAIL_ON_ERROR, 0L);

  DosRead(hfCom, (PVOID) & ch, 1L, &BytesRead);

  DosWrite(hfCom, &ch, sizeof(ch), &BytesWritten);
___
 * MR/2 2.05 NR * billyoc{at}netcom.com

--- Maximus/2 2.01wb