INT 15 - TopView - SEND MESSAGE - "REDRAW" - REDRAW WINDOW
        AH = 12h
        BH = 13h
        BL = window object
            00h DWORD on top of stack is handle for window to redraw
            01h redraw task's default window
            0Ch (DV 2.26+) redraw window of task owning handle on top of stack
            0Dh (DV 2.26+) redraw default window of parent of current task
SeeAlso: AH=12h/BH=0Eh