Int 2F Fn 112F  CU - Ifsfunc.exe (dos 4.x Only) - Ifs Ioctl                [N]

   AX = 112Fh
   SS = DOS DS
   STACK: WORD function in low byte
       00h ???
           DS:SI -> Current Directory Structure???
           CL = drive (1=A:)
       01h ???
           DS:SI -> ???
           CL = file handle???
       02h ???
           DS:SI -> Current Directory Structure???
           DI = ???
           CX = drive (1=A:)
   ???

Return: CF set on error
       AX = DOS error code (see #1366 at INT 21/AH=59h/BX=0000h)
   CF clear if successful

Note:  this function is called by the DOS 4.0 kernel

See Also: INT 21/AH=6Bh