On pressing 'wildchar' (usually ) to invoke completion, the possible matches are shown just above the command line, with the first match highlighted (overwriting the status line, if there is one).

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AVIVO ATI and new deinterlacer.
Therefore, although the allocator looks after its own NonDelegatingQueryInterface function, it delegates all reference counting to the owning filter.
This means that this command will not affect the command history, nor will it affect GDB's notion of which command to repeat if RET is pressed on a line by itself.