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Windows Search enables you to manage the Windows Search index with three main components: Search Manager, Catalog Manager, and Crawl Scope Manager. Some of these management interfaces can be used with standard user privileges, but those that change the state of the index require administrative privileges.
Provides methods to manage an individual search catalog, such as causing a re-indexing or setting time-outs. This interface manages the catalog in four areas:
Catalog contents - ensuring that new data is indexed and that other applications and components work properly by forcing a re-indexing of all or part of the catalog or by resetting the entire catalog.
Catalog properties - setting properties that determine how the catalog manages time-outs when connecting to protocol handlers and how diacritical marks are treated in searches.
Catalog status - getting information about the catalog, including status, size, and current activity state.
Access to other interfaces - retrieving other search-related interfaces required by the Crawl Scope Manager, data change notifications, and the ISearchQueryHelper interface.
Provides methods to inform the search engine about containers to crawl or watch, and items under those containers to include or exclude in the index. You can also query the Crawl Scope Manager to see if a particular URL is in the crawl scope.