Int 21 Fn 4402  - Workgrp.sys - Get Api Entry Point                        [N]

   AX = 4402h
   BX = file handle for device "NET$HLP$"
   CX = 0008h
   DS:DX -> buffer for entry point record (see #1172)

Return: CF clear if successful
       AX = number of bytes actually read
   CF set on error
       AX = error code
Program: WORKGRP.SYS is the portion of Microsoft's Workgroup Connection which
     permits communication with PCs running Windows for Workgroups or
     LAN Manager

See Also: AH=3Fh"WORKGRP.SYS"

Format of WORKGRP.SYS entry point record:
Offset Size    Description (Table 1172)
 00h   WORD    3633h  \ signature???
 02h   WORD    EF6Fh  /
 04h   DWORD   address of entry point (see #1173)

Note:  first four bytes of buffer must be 6Fh E9h 33h 36h on entry when using
     IOCTL rather than READ to get the entry point record

(Table 1173)
Call WORKGRP entry point with:
   STACK:  WORD    function number (0000h-0009h)

Return: STACK unchanged

See Also: #1174,#1175,#1176,#1177,#1178,#1179,#1180,#1181

(Table 1174)
Call WORKGRP function 00h with:
   STACK:  WORD    0000h (function "get ???")

Return: DX:AX -> data table

(Table 1175)
Call WORKGRP function 01h with:
   STACK:  WORD    0001h (function "hook ???")

Return: STACK: DWORD   pointer to ???
       WORD    0001h (function number)

(Table 1176)
Call WORKGRP function 02h with:
   STACK:  WORD    0002h (function "unhook ???")
   ???

Return: ???

(Table 1177)
Call WORKGRP function 03h with:
   STACK:  WORD    0003h (function "reenable printer port")
       WORD    LPT port number

Return: ???

(Table 1178)
Call WORKGRP function 04h with:
   STACK:  WORD    0004h (function "disable printer port")
       WORD    LPT port number

Return: ???

(Table 1179)
Call WORKGRP function 05h with:
   STACK:  WORD    0005h (function "???")
       ???

Return: ???

(Table 1180)
Call WORKGRP function 06h with:
   STACK:  WORD    0006h (function "???")

Return: STACK unchanged
   AX = 0000h
   DX = 0000h

(Table 1181)
Call WORKGRP functions 07h-09h with:
   STACK:  WORD    0007h-0009h (NOP functions)

Return: STACK unchanged
   AX = 0001h
   DX = 0000h