cpp-docs/docs/cppcx/codesnippet/CPP/walkthrough-creating-a-windows-store-app-using-wrl-and-media-foundation_1.idl at main · MicrosoftDocs/cpp-docs · GitHub

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import "Windows.Media.idl";

#include <sdkddkver.h>

namespace GrayscaleTransform
{
    [version(NTDDI_WIN8), activatable(NTDDI_WIN8)]
    runtimeclass GrayscaleEffect
    {
        [default] interface Windows.Media.IMediaExtension;
    }
}