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In VLF-WIN, a filter or command handler can programmatically shrink the filter pane, the command handler pane, the instance list, or the navigate pane, and can also re-expand them. Command handlers can also programmatically expand themselves to occupy the space used by the filters and instance list (Maximize), and restore themselves back to their original size.
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These methods are asynchronous – the request is queued up and waits for the command handler or filter that issued the instruction to finish its processing before the expand/shrink/maximize/restore is performed.