| UID | title | description | helpviewer_keywords | old-location | tech.root | ms.assetid | ms.date | ms.keywords | req.header | req.include-header | req.target-type | req.target-min-winverclnt | req.target-min-winversvr | req.kmdf-ver | req.umdf-ver | req.ddi-compliance | req.unicode-ansi | req.idl | req.max-support | req.namespace | req.assembly | req.type-library | req.lib | req.dll | req.irql | targetos | req.typenames | req.redist | ms.custom | f1_keywords | dev_langs | topic_type | api_type | api_location | api_name | ||||||||||||||||||||
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NF:mfobjects.IMFAttributes.GetUnknown |
IMFAttributes::GetUnknown (mfobjects.h) |
Retrieves an interface pointer associated with a key. |
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mf\imfattributes_getunknown.htm |
mf |
a5f645a1-b7d2-47d3-b77e-ad94815b1c25 |
12/05/2018 |
GetUnknown, GetUnknown method [Media Foundation], GetUnknown method [Media Foundation],IMFAttributes interface, IMFAttributes interface [Media Foundation],GetUnknown method, IMFAttributes.GetUnknown, IMFAttributes::GetUnknown, a5f645a1-b7d2-47d3-b77e-ad94815b1c25, mf.imfattributes_getunknown, mfobjects/IMFAttributes::GetUnknown |
mfobjects.h |
Mfidl.h |
Windows |
Windows Vista [desktop apps \| UWP apps] |
Windows Server 2008 [desktop apps \| UWP apps] |
Mfuuid.lib |
Windows |
19H1 |
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Retrieves an interface pointer associated with a key.
GUID that identifies which value to retrieve. The attribute type must be MF_ATTRIBUTE_IUNKNOWN.
Interface identifier (IID) of the interface to retrieve.
Receives a pointer to the requested interface. The caller must release the interface.
The method returns an HRESULT. Possible values include, but are not limited to, those in the following table.
| Return code | Description |
|---|---|
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The method succeeded. |
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The attribute value is an IUnknown pointer but does not support requested interface. |
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The specified key was not found. |
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The attribute value is not an IUnknown pointer. |
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.