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

   AX = 1684h
   BX = 044Ah (virtual device ID for "mmdevldr" device) (see #2329)
   ES:DI = 0000h:0000h

Return: ES:DI -> VxD API entry point (see #2372)
         0000h:0000h if the VxD does not support API in current mode

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

(Table 2372)
Call MMDEVLDR.VXD entry point with:
   DX = function number
       0000h ???

       Return: CF clear if successful
               AX = 0000h
           CF set on error
               AX = error code (000Bh)

       Note:   invokes VxDCall 17000Eh ("CallAtAppyTime")
       0001h ???

       Return: CF clear if successful
               AX = 0000h
           CF set on error
               AX = error code (000Bh)

       Note:   invokes VxDCall 17000Eh ("CallAtAppyTime")
       0002h ???
       EDX = ???

       Return: CF clear if successful
               AX = 0000h
               EDX = ???
           CF set on error
               AX = error code
       0003h ???

       Return: CF clear if successful
               AX = 0000h
           CF set on error
               AX = error code

       Note:   invokes VxDcall 2A0002h ("VWIN32_QueueUserApc")
       0004h set Win32 event

       Return: CF clear if successful
               AX = 0000h
           CF set on error
               AX = error code

       Note:   invokes VxDcall 2A000Eh ("VWIN32_SetWin32Event")
       0005h ??? (allocates some memory)

       Return: CF clear
           AX = 0000h
       0006h ??? (frees memory)

       Return: CF clear if successful
               AX = 0000h
           CF set on error
               AX = error code
       else

       Return: CF set
           AX = 000Bh (invalid function)

See Also: #2371,#2373