IMFAttributes::SetUnknown method
Associates an IUnknown pointer with a key.
Syntax
HRESULT SetUnknown( [in] REFGUID guidKey, [in] IUnknown *pUnknown );
Parameters
- 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.
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
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 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
|
Minimum supported client |
Windows Vista [desktop apps | Windows Store apps] |
|---|---|
|
Minimum supported server |
Windows Server 2008 [desktop apps | Windows Store apps] |
|
Header |
|
|
Library |
|
See also