Retrieves a value (internal value-type property) from a chunk, which must have a CHUNKSTATE enumeration value of CHUNK_VALUE.
- ppPropValue [out]
Pointer to a variable that receives a pointer to the PROPVARIANT structure that contains the value-type property.
The current chunk does not have a CHUNKSTATE enumeration value of CHUNK_VALUE.
Allocate the PROPVARIANT structure with CoTaskMemAlloc. Some PROPVARIANT structures contain pointers that can be freed by calling the PropVariantClear function, which frees all elements that can be freed in a given PROPVARIANT structure. The caller of the IFilter::GetValue method is responsible for calling the PropVariantClear method.
Call the GetValue method only once per chunk.
Note that the effect of producing the same value from more than one chunk is undefined. Only the last setting of the value is valid.
For conceptual information about IFilter implementation, see Developing Filter Handlers. For information about IFilters and property handlers, see "Full-Text Support" and "Operating System Implementation Considerations" in Developing Property Handlers for Windows Search.
Minimum supported client
|Windows 2000 Professional [desktop apps only]|
Minimum supported server
|Windows 2000 Server [desktop apps only]|
|the Windows NT 4.0 Option Pack|
- Other Resources