DosDevIOCtl

#define INCL_DOSDEVICES

USHORT  rc = DosDevIOCtl(Data, ParmList, Function, Category, DevHandle);

PVOID            Data;          /* Data area */
PVOID            ParmList;      /* Command arguments */
USHORT           Function;      /* Device function */
USHORT           Category;      /* Device category */
HFILE            DevHandle;     /* Specifies the device */

USHORT           rc;            /* return code */