INT 15 - TopView - SEND MESSAGE - "AT" - POSITION OBJECT CURSOR
        AH = 12h
        BH = 11h
        BL = window for which to move cursor
            00h window's handle is DWORD on top of stack
            01h task's default window
            0Ch (DV 2.26+) default window of task owning handle on top of stack
            0Dh (DV 2.26+) default window of parent of current task
        STACK: DWORD column
               DWORD row