Int 10 Fn 81  U - Video - Desqview 2.0x Only - Internal - Get ???          [Q]

   AH = 81h
   DX = 4456h ('DV')

Return: ES = segment of DESQview data structure for video buffer
       BYTE ES:[0] = current window number in DV 2.0x

Note:  this function is probably meant for internal use only, due to the magic
     value required in DX

See Also: AH=82h"DESQview"