DosFSCtl

#define INCL_DOSFILEMGR

USHORT  rc = DosFSCtl(DataArea, DataLengthMax, DataLength, ParmList,
               ParmLengthMax, ParmLength, FunctionCode, RouteName,
               FileHandle, RouteMethod, 0);

PBYTE           DataArea;       /* Data area  */
USHORT          DataLengthMax ; /* Data area length */
PUSHORT         DataLength;     /* Data area length (returned) */
PBYTE           ParmList;       /* Parameter list */
USHORT          ParmLengthMax ; /* Parameter list length  */
PUSHORT         ParmLength;     /* Parameter list length (returned)  */
USHORT          FunctionCode;   /* Function code  */
PSZ             RouteName;      /* Path or FSD name */
HFILE           FileHandle;     /* File handle  */
USHORT          RouteMethod;    /* Method for routing.  */
ULONG           0;              /* Reserved (must be zero)  */

USHORT           rc;            /* return code */