IMFAttributes::SetUnknown Method
Associates an IUnknown pointer with a key.
Syntax
HRESULT SetUnknown(
[in] REFGUID guidKey,
[in] IUnknown *pUnknown
);
Parameter
guidKey [in]
GUID that identifies the value to set. If this key already exists, the method overwrites the old value.pUnknown [in]
IUnknown pointer to be associated with this key.
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
To retrieve the IUnknown pointer, call IMFAttributes::GetUnknown.
It is not an error to call SetUnknown with pUnknown equal to NULL. However, GetUnknown will return MF_E_INVALIDTYPE.
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 |