C language function:MFGetAttributeString sample codes

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TITLE : MediaFoundation/CMC.MFAPI.pas at master CMCHTPC/MediaFoundation GitHub
function MFGetAttributeString(pAttributes: IMFAttributes; const guidKey: TGUID; out ppsz: PWideChar // PWSTR.......
http://github.com/CMCHTPC/MediaFoundation/blob/master/Units/CMC.MFAPI.pas


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