Gary Chambers wrote in a message to All:

GC> Anyhow, I'm attempting to get the DosDevIOCtl call working.
GC> Given the following, I receive a "Variable reference
required" error:

GC> Program TestDevices;

GC>  rc := DosDevIOCtl(FileHandle, IOCTL_ASYNC, ASYNC_GETBAUDRATE,
GC>                    {at}Dummy, Dummy, Dummy,  <-----PULONG
GC>                    pusBaud, sizeof(USHORT), {at}Dummy);

 BOOL IsCarrier(HFILE hfModem)
 {
     APIRET rc;
     USHORT msr=0;
     ULONG ulpinout=0, uldinout=0;

     rc = DosDevIOCtl(hfModem, IOCTL_ASYNC, ASYNC_GETMODEMINPUT, 
                       NULL, 0, &ulpinout, 
                       &msr, sizeof(msr), &uldinout);
  ...
  }
 //above code stolen from : Peter Fitzsimmons {at}1:250/292.0


    The 6th parameter should be a pointer to a ULONG.


  Lionel.
--- timEd/2-B11