IMFAttributes::CompareItem Method
Queries whether a stored attribute value equals to a specified PROPVARIANT.
Syntax
HRESULT CompareItem(
[in] REFGUID guidKey,
[in] REFPROPVARIANT Value,
[out] BOOL *pbResult
);
Parameter
guidKey [in]
GUID that identifies which value to query.Value [in]
PROPVARIANT that contains the value to compare.pbResult [out]
Receives a Boolean value indicating whether the attribute matches the value given in Value. See Remarks. This parameter must not be NULL. If this parameter is NULL, an access violation occurs.
Rückgabewert
The method returns an HRESULT. Possible values include, but are not limited to, those in the following table.
| Rückgabecode | Beschreibung |
|---|---|
| S_OK | The method succeeded. |
Hinweise
The method sets pbResult to FALSE for any of the following reasons:
No attribute is found whose key matches the one given in guidKey.
The attribute's PROPVARIANT type does not match the type given in Value.
The attribute value does not match the value given in Value.
The method fails.
Otherwise, the method sets pbResult to TRUE.
This interface is available on the following platforms if the Windows Media Format 11 SDK redistributable components are installed:
- Windows XP mit Service Pack 2 (SP2) und höher.
- Windows XP Media Center Edition 2005 with KB900325 (Windows XP Media Center Edition 2005) and KB925766 (Oktober 2006 Updaterollup für Windows XP Media Center Edition) installed.
Anforderungen
Mindestens unterstützter Client |
Windows Vista |
Mindestens unterstützter Server |
Windows Server 2008 |
Header |
Mfobjects.h (include Mfidl.h) |
Bibliothek |
Mfuuid.lib |