INT 15 - TopView - SEND MESSAGE - "SUBFROM" - RESET OBJECT BITS
        AH = 12h
        BH = 0Bh
        BL = object
            00h handle is DWORD on top of stack
                pointer: reset control flags
                keyboard: reset control flags
            04h clear control flags on KEYBOARD object (handle on top of stack)
            05h clear control flags on task's default KEYBOARD object
        STACK:  DWORD   which bits to clear (see AH=12h/BH=0Ah"OBJECT")