X-Hacker.org- Ralf Brown's Interrupt List (Part 1,2) - int 15 - topview - send message - lock

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INT 15 - TopView - SEND MESSAGE - "LOCK" - REQUEST EXCLUSIVE ACCESS TO RESOURCE
        AH = 12h
        BH = 14h
        BL = object
            00h mailbox handle is DWORD on top of stack
            02h use given task's mailbox (task's handle on top of stack)
            03h use current task's default mailbox
Note:   release exclusive access by sending CLOSE message to mailbox
        access may be requested multiple times, and requires multiple CLOSEs
SeeAlso: AH=12h/BH=0Dh

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