BIOS / Int / Int 15 / 12/0B

       INT 15 - TopView - SEND MESSAGE - "SUBFROM" - RESET OBJECT BITS

Input			Output
AX	12h			AX
BX	0Bh	Object		BX
CX				CX
DX				DX
ES:DI				ES:DI

Object:

        00h handle is DWORD on top of stack
            window: write attributes only
            mailbox: send message by reference
            pointer: reset control flags
        01h write attributes only to task's default window
        02h send msg/status by reference to mailbox (task's handle on stack)
        03h send msg/status by reference to current task's mailbox
        04h clear control flags on KEYBOARD object (handle on top of stack)
        05h clear control flags on task's default KEYBOARD object
        06h remove specific object from OBJECTQ (task's handle on stack)
        07h remove specific object from task's default OBJECTJ

STACK: (if mailbox) DWORD status
                    DWORD length
                    DWORD address
       (if window)  DWORD number of attributes to write
                    DWORD address of attributes
       (if objectq) DWORD handle of object to remove
       (otherwise)  DWORD indicates which bits to clear