Int 21 Fn 7156  - Windows95 - Long Filename - Rename File                  [D]

   AX = 7156h
   DS:DX -> ASCIZ old file or directory name (long names allowed)
   ES:DI -> ASCIZ new name (long names allowed)

Return: CF clear if successful
   CF set on error
       AX = error code
       7100h if function not supported

Note:  the file may be renamed into a different directory, but not across
     disks

See Also: AH=56h,AX=7141h