IMFAttributes::Compare method (mfobjects.h)
Compares the attributes on this object with the attributes on another object.
Syntax
HRESULT Compare(
[in] IMFAttributes *pTheirs,
[in] MF_ATTRIBUTES_MATCH_TYPE MatchType,
[out] BOOL *pbResult
);
Parameters
[in] pTheirs
Pointer to the IMFAttributes interface of the object to compare with this object.
[in] MatchType
Member of the MF_ATTRIBUTES_MATCH_TYPE enumeration, specifying the type of comparison to make.
[out] pbResult
Receives a Boolean value. The value is TRUE if the two sets of attributes match in the way specified by the MatchType parameter. Otherwise, the value is FALSE.
Return value
The method returns an HRESULT. Possible values include, but are not limited to, those in the following table.
Return code | Description |
---|---|
|
The method succeeded. |
Remarks
If pThis is the object whose Compare method is called, and pTheirs is the object passed in as the pTheirs parameter, the following comparisons are defined by MatchType.
Match type | Returns TRUE if and only if |
---|---|
MF_ATTRIBUTES_MATCH_OUR_ITEMS | For every attribute in pThis, an attribute with the same key and value exists in pTheirs. |
MF_ATTRIBUTES_MATCH_THEIR_ITEMS | For every attribute in pTheirs, an attribute with the same key and value exists in pThis. |
MF_ATTRIBUTES_MATCH_ALL_ITEMS | The key/value pairs are identical in both objects. |
MF_ATTRIBUTES_MATCH_INTERSECTION | Take the intersection of the keys in pThis and the keys in pTheirs. The values associated with those keys are identical in both pThis and pTheirs. |
MF_ATTRIBUTES_MATCH_SMALLER | Take the object with the smallest number of attributes. For every attribute in that object, an attribute with the same key and value exists in the other object. |
The pTheirs and pbResult parameters must not be NULL. If either parameter is NULL, an access violation occurs.
This interface is available on the following platforms if the Windows Media Format 11 SDK redistributable components are installed:
- Windows XP with Service Pack 2 (SP2) and later.
- Windows XP Media Center Edition 2005 with KB900325 (Windows XP Media Center Edition 2005) and KB925766 (October 2006 Update Rollup for Windows XP Media Center Edition) installed.
Requirements
Requirement | Value |
---|---|
Minimum supported client | Windows Vista [desktop apps | UWP apps] |
Minimum supported server | Windows Server 2008 [desktop apps | UWP apps] |
Target Platform | Windows |
Header | mfobjects.h (include Mfidl.h) |
Library | Mfuuid.lib |