Int 2F Fn 1684  P - Ms Windows - Vpd - Get Api Entry Point                 [W]

   AX = 1684h
   BX = 000Fh (virtual device ID for VPD device) (see #2329)
   ES:DI = 0000h:0000h

Return: ES:DI -> VxD API entry point (see #2340)
         0000h:0000h if the VxD does not support API in current mode

See Also: AX=1684h"DEVICE API",INT 20"Windows"

(Table 2340)
Call VPD entry point with:
   EDX = function number
       0000h get VPD version

       Return: CF clear
           AH = major version
           AL = minor version
           DX = ??? (CB01h)
       0001h get valid??? printers

       Return: CF clear
           AX = bitmask of ??? printers (bits 0-2)
       0002h get ??? for printer
       CX = printer port (0-2)

       Return: CF clear if successful
               BX:AX = ???
           CF set on error (invalid port number)
       0003h set ??? for printer
       CX = printer port (0-2)
       BX:AX = ???

       Return: CF clear if successful
           CF set on error (invalid port number)
       0004h ???
       CX = printer port (0-2)
       EAX = VM handle

       Return: CF clear if successful
           CF set on error (invalid port number)
       0005h ???
       CX = printer port (0-2)
       EAX = VM handle

       Return: CF clear if successful
           CF set on error (invalid port number or ???)
       0006h-000Eh unused

       Return: CF set
       000Fh ???
       CX = printer port (0-2)
       AX = ???

       Return: CF clear if successful
           CF set on error (e.g. invalid port number)
       0010h ???
       CX = printer port (0-2)

       Return: CF clear if successful
           CF set on error (e.g. invalid port number)
       0011h ???
       CX = printer port (0-2)

       Return: CF clear if successful
           CF set on error (e.g. invalid port number)
       0012h get port status
       CX = printer port (0-2)

       Return: CF clear if successful
               AX = port status (see #P263 at PORT 03BCh"LPT")
           CF set on error (e.g. invalid port number)
       else

       Return: CF set

Note:  these functions are apparently only available from the system VM,
     returning CF set

See Also: #2339,#2341