Contains an IMFFieldOfUseMFTUnlock pointer, which can be used to unlock a Media Foundation transform (MFT). The IMFFieldOfUseMFTUnlock interface is used to unlock an MFT that has field-of-use restrictions.
IMFFieldOfUseMFTUnlock* stored as IUnknown*
To get this attribute, call IMFAttributes::GetUnknown.
To set this attribute, call IMFAttributes::SetUnknown.
For more information about this attribute, see Field of Use Restrictions.
The GUID constant for this attribute is exported from mfuuid.lib.
Minimum supported client
|Windows 7 [desktop apps | Windows Store apps]|
Minimum supported server
|Windows Server 2008 R2 [desktop apps | Windows Store apps]|