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Andrew Cencini: In this article, I will not focus as much on the fairly extensive ‘baggage’ that is involved in supporting the IFilter interface (there are many approaches to hooking the various pieces together), but rather, I’ll spend more time explaining how to get everything working so you can experiment further with your IFilters and fine-tune the techniques employed to make these components available in C#. [via Don Box]

I’ve worked on writing managed components supporting IFilter in order to process metadata into Microsoft Index Server for querying both as part of a full text search and an extensible data store. This is one of the things that I hope WinFS will improve but for now this is a good example as an introduction to IFilter.