Int 2F Fn 1191  - LAN Manager Enhanced DOS - Doswriteasynchnmpipe2         [N]

   AX = 1191h
   DS:SI -> stack frame (see below)

Return: CF clear if successful
   CF set if error
       AX = error code

See Also: AX=118Fh,AX=1190h,INT 21/AX=5F3Ah

Format of DosReadAsynchNmPipe2 stack frame:
Offset Size    Description
 00h   DWORD   -> number of bytes read
 04h   WORD    size of buffer
 06h   DWORD   -> buffer
 0Ah   DWORD   -> return code
 0Eh   DWORD   function to call on completion as function( char far *buffer )
 12h   WORD    handle
 14h   DWORD   ???