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dtSearch Text Retrieval Engine Programmer's Reference
dtsSearchFilter::makeFrom Method
void makeFrom(dtsSearchResultsHandle hResults);

Select all document ids listed in search results (deprecated) 

makeFrom() is deprecated because the search results may contain only some of the matching documents (for example, a SearchResults object may contain only the best-matching 100 documents). Instead, either using selectItemsBySearch or setting SearchJob.WantResultsAsFilter is recommended, to ensure that the SearchFilter produced is complete.

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