Int 21 Fn 71A9  - Windows95 - Long Filename - Server Create Or Open File   [D]

   AX = 71A9h
   BX = access mode and sharing flags (see #1471,also AX=6C00h)
   CX = attributes
   DX = action (see #1470)
   DS:SI -> ASCIZ filename
   DI = alias hint (number to append to short filename for disambiguation)

Return: CF clear if successful
       AX = global file handle
       CX = action taken
       0001h file opened
       0002h file created
       0003h file replaced
   CF set on error
       AX = error code (see #1366)
       7100h if function not supported

Note:  for use by real-mode servers only

See Also: AX=6C00h,AX=716Ch