Enumerating Objects in a Filter Graph
An application might need to locate a particular filter in the filter graph, or even a particular pin on a filter. For example, it might use an interface that a particular filter exposes. Or, it might construct a specialized filter graph and need to call methods on individual pins to connect the filters. For this purpose, DirectShow provides several methods for enumerating objects in a filter graph.
The enumerators discussed in this section follow the standard form used by COM enumeration interfaces. For more information, see the "IEnumXXXX" topic in the Platform SDK. For information on enumerating filters that are registered on the user's computer, but aren't yet in the filter graph, see Enumerating Devices and Filters.
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