IMFDXGIBuffer::GetUnknown method (mfobjects.h)

Gets an IUnknown pointer that was previously stored in the media buffer object.

Syntax

HRESULT GetUnknown(
  [in]  REFIID guid,
  [in]  REFIID riid,
  [out] LPVOID *ppvObject
);

Parameters

[in] guid

The identifier of the IUnknown pointer.

[in] riid

The interface identifier (IID) of the interface being requested.

[out] ppvObject

Receives a pointer to the interface. The caller must release the interface.

Return value

This method can return one of these values.

Return code	Description
S_OK	Success.
E_NOINTERFACE	The object does not support the specified interface.
MF_E_NOT_FOUND	The specified key was not found.

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)

See also

IMFDXGIBuffer

IMFDXGIBuffer::SetUnknown