INT 15 - TopView - SEND MESSAGE - "ERASE" - ERASE OBJECT
        AH = 12h
        BH = 0Eh
        BL = object
            00h handle is DWORD on top of stack
                window:   clear from scroll origin to end of window
                keyboard: discard input
                timer:    cancel current interval
                pointer:  discard all pending messages
                mailbox:  discard all pending messages
            01h clear task's default window from scroll origin to end
            02h discard all queued messages in mailbox (handle on top of stack)
            03h discard all queued messages in current task's default mailbox
            04h discard all input queued to KEYBOARD (handle on top of stack)
            05h discard all input queued to task's default KEYBOARD
            06h remove all objects from OBJECTQ (task's handle on top of stack)
            07h remove all objects from current task's OBJECTQ
            0Ch (DV 2.26+) clear window of task owning handle on top of stack
            0Dh (DV 2.26+) clear default window of parent of current task
Note:   when an OBJECTQ is erased, each object in the OBJECTQ is also erased