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LoadIFilterFromStorageEx Method

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The LoadIFilterFromStorageEx method of the IFilterRegistration interface retrieves the appropriate IFilter for the specified data source that is available in an IStream object.

Parameters

pStg   [in] A pointer to an IStorage object holding the class ID of the data source type to be filtered.

pUnkOuter   [in] A pointer to the outer IUnknown object for the filter to be returned.

pwcsOverride    [in] A pointer to a WCHAR that contains an override string, such as the application name.

fUseDefault   [in] A BOOL that specifies that the default filter should be used if a more suitable one is not found.

pFilterClsid   [out] A pointer to a CLSID that receives the class ID of the returned filter.

SearchDecSize   [in, out] Not used. Value should be 0.

pwcsSearchDesc  [out, size_is(*SearchDecSize)] Not used. Value should be 0.

ppIFilt   [out] An address of a pointer that receives the pointer to the IFilter requested. The value is null if no filter is found.

Exceptions

For a list of errors returned by Microsoft SharePoint Portal Server Search IFilter administration interfaces, see IFilter Administration Error Messages.

Remarks

The LoadIFilterFromStorageEx method attempts to load an IFilter that can process the data source of the type specified in the pFilteredSource parameter, located in the stream pStm.

If no suitable IFilter is found for the data source, and fUseDefault is false, this method returns null in the ppIFilt parameter. If fUseDefault is true, and no suitable IFilter is found for the data source, the IFilter interface on the default IFilter is returned in ppIFilt.

The IFilter must be released after it is used.

Requirements

Platform: Microsoft Windows Server 2003