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         INT 15 - TopView - SEND MESSAGE - "ADDR" - GET OBJECT HANDLE         
 Return: DWORD on stack is handle
Object:
        00h handle in DWORD on top of stack
        02h sender of last msg read from mailbox (task's handle on stack)
        03h sender of last msg read from current task's mailbox | ||||||||||||||||||||||||||||||||||||||
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