Format of OS/2 Virtual DOS Machine FSQAttachStruc:
Offset	Size	Description	)
 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.