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Stores an arbitrary IUnknown pointer in the media buffer object.
Syntax
HRESULT SetUnknown(
[in] REFIID guid,
[in] IUnknown *pUnkData
);
Parameters
[in] guid
The identifier for the IUnknown pointer. This identifier is used as a key to retrieve the value. It can be any GUID value.
[in] pUnkData
A pointer to the IUnknown interface. Set this parameter to NULL to clear a pointer that was previously set.
Return value
This method can return one of these values.
| Return code | Description |
|---|---|
|
Success. |
|
An item already exists with this key. |
Remarks
To retrieve the pointer from the object, call IMFDXGIBuffer::GetUnknown.
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client | Windows 8 [desktop apps | UWP apps] |
| Minimum supported server | Windows Server 2012 [desktop apps | UWP apps] |
| Target Platform | Windows |
| Header | mfobjects.h (include Mfidl.h) |