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dtSearch Text Retrieval Engine Programmer's Reference
ISearchFilter::ReadMultiple Method
HRESULT ReadMultiple(BSTR filtersToRead, [out, retval] long * pVal);

Read a series of search filters from disk files. The filenames list is a space-delimited list of filenames. Filenames containing spaces should be quoted in the string. Returns the number of search filters read successfully. All of the search filters are logically combined with an "OR" operation.

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