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INT 15 - TopView - SEND MESSAGE - "WRITE" - WRITE TO OBJECT
        AH = 12h
        BH = 05h
        BL = object
            00h handle is DWORD on top of stack
                timer: start timer to end at a specified time
                keyboard: add input buffer to queue
                pointer: move pointer icon to specified position
            02h send message by value/status=0 to mbox (task's handle on stack)
            03h send message by value/status=0 to current task's mailbox
            04h add input buffer to KEYBOARD queue (handle on top of stack)
            05h add input buffer to task's default KEYBOARD queue
            06h add an object to OBJECTQ (handle on top of stack)
            07h add an object to task's default OBJECTQ
        STACK: (if mailbox)  DWORD length
                             DWORD address
               (if keyboard) DWORD status (scan code in keystroke mode)
                             DWORD length (should be 1 in keystroke mode)
                             DWORD address
               (if objectq)  DWORD handle of object to add
               (if timer)    DWORD 1/100ths seconds since midnight (actually
                                   only accurate to 1/18 sec)
               (if pointer)  DWORD column relative to origin of window
                             DWORD row relative to origin of window
Notes:  under DV 2.2+, failed mailbox writes may return CF set (see AX=DE15h)
        the data and status written to a keyboard object must match the format
          returned by the keyboard object in the current mode
        the pointer position is scaled according to the current scaling factors
SeeAlso: AH=12h/BH=04h