DirectShow как добавить фильтр?

            m_Playback = new DSFilePlayback();
            m_Playback.VideoControl = this.pbPreview;
            m_Playback.OnPlaybackStart += new EventHandler(Playback_OnPlaybackStart);
            m_Playback.OnPlaybackStop += new EventHandler(Playback_OnPlaybackStop);
            m_Playback.OnPlaybackReady += new EventHandler(Playback_OnPlaybackReady);

            DSFilter fil = new DSFilter("7FB1203E-5E75-4ead-AB36-92C41CF9DAA5");
            m_Playback.Filters.Add(fil);

public class SampleGraph : DSFilePlayback
    {
        protected override HRESULT OnInitInterfaces()
        {
            HRESULT hr = S_OK;
            // Create rotate filter
            DSFilter _rotate = new DSFilter(new DxPlayer.VideoRotationFilter());
 
            // Add it to filter graph
            _rotate.FilterGraph = m_GraphBuilder;
            // Call base class for render file
            hr = base.OnInitInterfaces();
            // if succeeded we should check if rotate filter connected
            if (hr.Succeeded)
            {
                if (!_rotate.InputPin.IsConnected) // rotate filter not connected
                {
 
                    hr = VFW_E_CANNOT_CONNECT;
                }
            }
            hr.Assert();
            return hr;
        }
    }