IMFMediaBuffer::Unlock method (mfobjects.h)

Unlocks a buffer that was previously locked. Call this method once for every call to IMFMediaBuffer::Lock.

Syntax

HRESULT Unlock();

The method returns an HRESULT. Possible values include, but are not limited to, those in the following table.

Return code	Description
S_OK	The method succeeded.
D3DERR_INVALIDCALL	For Direct3D surface buffers, an error occurred when unlocking the surface.

It is an error to call Unlock if you did not call Lock previously.

After calling this method, do not use the pointer returned by the Lock method. It is no longer guaranteed to be valid.

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.

Requirement	Value
Minimum supported client	Windows Vista [desktop apps \| UWP apps]
Minimum supported server	Windows Server 2008 [desktop apps \| UWP apps]
Target Platform	Windows
Header	mfobjects.h (include Mfidl.h)
Library	Mfuuid.lib