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

   AX = 1684h
   BX = 7FE0h (virtual device ID for VSWITCHD device) (see #2329)
   ES:DI = 0000h:0000h

Return: ES:DI -> VxD API entry point (see #2402)
         0000h:0000h if the VxD does not support an API

(Table 2402)
Call VSWITCHD entry point with:
   AX = function
       0000h toggle windowed mode (simulate Alt-Enter keypress)

       Return: nothing
       0001h get windowed mode

       Return: CF clear if VM is windowed
           CF set if VM is full-screen

See Also: #2399,#2403