EH> Hi,
EH> 
EH> Can somebody please provide me with an example of how to 
EH> set the nr of databits, the parity and the number of 
EH> stopbits using DosDevIOCtl(). I am a little confused about 
EH> the format and size of the parameterlist.
EH> 
EH> Erwin

Hi Erwin!

Find the part of your compiler's OS/2 C headers that should define a
LINECONTROL structure and the values of IOCTL_ASYNC and
ASYNC_SETLINECTL. Read these headers--it usually helps to know what
your are doing :).

Then you might use this clipped bit of code as an example (the
variable parity is of type  parity_t which is an enum I use, use your
own if you like:)

        LINECONTROL lc;
        ULONG ulParamLen = sizeof(lc);
        // set line parity, data bits, and stop bits.
        switch(parity)
        {
                case NOPAR:
                        lc.bParity = 0;
                        break;
                case ODDPAR:
                        lc.bParity = 1;
                        break;
                case EVNPAR:
                        lc.bParity = 2;
                        break;
                case MRKPAR:
                        lc.bParity = 3;
                        break;
                case SPAPAR:
                        lc.bParity = 4;
                        break;
                default:
                        break;
        }
        if(dataBits > 4 && dataBits < 10)
                lc.bDataBits = dataBits;
        if(stopBits >= 0 && stopBits < 3)
        switch(stopBits)
        {
        case 1:
                lc.bStopBits = 0;
                break;
        case 2:
                lc.bStopBits = 2;
                break;
         default:
                break;
        }
        lastResult = DosDevIOCtl(hf, IOCTL_ASYNC, ASYNC_SETLINECTRL, (PVOID)&lc,
                sizeof(lc), &ulParamLen, NULL, 0, (PULONG)NULL);
--- Maximus/2 3.01