Int 21 Fn 5F43  u - LAN Manager Enhanced DOS - Local Dosprintjobgetid      [N]

   AX = 5F43h
   BX = handle of remote print job
   CX = size of PRIDINFO struture
   ES:DI -> PRIDINFO structure (see below)

Return: CF clear if successful
       PRIDINFO filled in
   CF set on error
       AX = error code

Format of PRIDINFO structure:
Offset Size    Description
 00h   WORD    job id
 02h 16 BYTEs  server name
 12h 13 BYTEs  queue name
 1Fh  1 BYTE   pad