Function 82h	DESQview - Get Current Window Info 
entry   AH      82h 
	DX      4456h ('DV') 
return  AH      unknown 
	AL      current window number 
	BH      unknown 
	BL      direct screen writes 
		0       program does not do direct writes 
		1       program does direct writes, so shadow buffer not usable 
	CH      unknown 
	CL      current video mode 
	DS      segment in DESQview for data structure 
		in DV 2.00, 
		  byte DS:[0] = window number 
		  word DS:[1] = segment of other data structure 
		  word DS:[3] = segment of window's object handle 
	ES      segment of DESQview data structure for video buffer 
note    This function is probably meant for internal use only, due to the magic 
	value required in DX

  .