INT 15 - TopViewTopView, DESQview, TaskView, OmniView, other compatibles - "PRINTC" - DISPLAY CHARACTER/ATTRIBUTE ON SCREEN
	AX = 1003h
	BH = attribute
	BL = character
	DX = segment of object handle for window
Return: nothing
Note:	BX=0000h does not display anything, it only positions the hardware
	  cursor to the logical cursor's current position