Set audio output device per application

How can I change the playback audio output device for an application with WASAPI.

I'm using C# and already have code to set volume per application

public static void SetApplicationVolume(string name, float level)
        {
            ISimpleAudioVolume volume = GetVolumeObject(name);
            if (volume == null)
                return;

            Guid guid = Guid.Empty;
            volume.SetMasterVolume(level / 100, ref guid);
        }