Int 21 Fn 71AA  - Windows95 - Long Filename - Query Subst                  [D]

   AX = 71AAh
   BH = 02h
   BL = drive number (01h = A:, etc.)
   DS:DX -> buffer for ASCIZ pathname associated with drive letter

Return: CF clear if successful
       DS:DX buffer filled
   CF set on error
       AX = error code (see #1366)
       7100h if function not supported

Note:  the specified drive number may not be 00h (default drive)

See Also: AX=71AAh/BH=00h,AX=71AAh/BH=01h,INT 2F/AX=1000h,#1329