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       INT 15 - TopView - SEND MESSAGE - "EOF" - GET OBJECT EOF STATUS        
 Return: DWORD on top of stack is status
Object:
        00h handle is DWORD on top of stack
        01h returns TRUE if logical cursor past end of task's def window
        02h return ??? for task's mailbox (task's handle on top of stack)
        03h return ??? for current task's mailbox | ||||||||||||||||||||||||||||||||||||||
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