Int 21 Fn 64  U - Os/2 V2.1+ Virtual Dos Machine - Os/2 Api Dosqfsattach   [O]

   AH = 64h
   BX = 00B6h (API ordinal)
   CX = 636Ch (magic value "cl")
   DS = user's data segment
   ES:DI -> FSQAttachStruc (see #1438)

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

See Also: AH=64h/CX=636Ch

Format of OS/2 Virtual DOS Machine FSQAttachStruc:
Offset Size    Description (Table 1438)
 00h   DWORD   reserved
 04h   DWORD   pointer to the offset of the data buffer length
 08h   DWORD   pointer to the offset of the data buffer
 0Ch   WORD    FSA Info level
 0Eh   WORD    ordinal index into table
 10h   DWORD   pointer to the offset of the device name

Notes: The segment value of the buffer, buffer length, and device
     name MUST all be the same.  It is defined on entry in the DS
     register.  The details of each info level are defined in the
     OS/2 CP Reference.