FILTERED_DATA_SOURCES
The FILTERED_DATA_SOURCES structure specifies parameters for a data source for which an IFilter is loaded. This data structure is used by methods of the LoadFilter object.
typedef struct _FILTERED_DATA_SOURCE { WCHAR const *pwcsExtension;
WCHAR const *pwcsMime;
CLSID const *pClsid;
WCHAR const *pwcsOverride;
} FILTERED_DATA_SOURCES;
Members
The following table shows the members of the FILTERED_DATA_SOURCES structure, with a brief description of each.
| Member | Data Type | Description |
|---|---|---|
| pwcsExtension | Pointer to a WCHAR | Contains a file name extension |
| pwcsMime | Pointer to a WCHAR | Contains the name of a MIME type |
| pClsid | Pointer to a CLSID | Contains a Class ID identifying the content type |
| pwcsOverride | Pointer to a WCHAR | Contains an override string |
Remarks
The FILTERED_DATA_SOURCES structure can hold one file content identifier of each type. If the pwcsOverride parameter is not null, the load methods will search first under the override area for a matching string. If pwcsOverride is a null string, then the IFilters that are not overridden will be searched. In both cases, the IFilters for the file extension or MIME type are searched first, followed by the Class ID. If no suitable IFilter is found, then the default IFilter is checked.
The following methods of the LoadFilter object use this structure:
- LoadIFilter method.
- LoadIFilterFromStreamEx method.