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/// <summary> start all the interfaces, graphs and preview window. </summary>
        private bool StartupVideo(UCOMIMoniker mon, Size _size)
        {
            int hr;
            try
            {
                if (!CreateCaptureDevice(mon))
                    return false;

                if (!GetInterfaces())
                    return false;

                if (!SetupGraph(_size))
                    return false;

                if (!SetupVideoWindow())
                    return false;


//#if DEBUG
//                DsROT.AddGraphToRot(graphBuilder, out rotCookie);    // graphBuilder capGraph
//#endif

                hr = mediaCtrl.Run();
                if (hr < 0)
                    Marshal.ThrowExceptionForHR(hr);
               

                //bool hasTuner = DsUtils.ShowTunerPinDialog( capGraph, capFilter, this.Handle );
                //toolBarBtnTune.Enabled = hasTuner;


                return true;
            }
            catch (Exception ex)
            {
               throw new Exception(string.Format("{0}{1}",ex,ex.GetBaseException()));
            }
        }                    

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pSC = IntPtr.Zero;
Marshal.FreeHGlobal(pSC);
mt = null;                       
Marshal.ReleaseComObject(videoConfigObj);
videoConfigObj = null;
Marshal.ReleaseComObject(videoConfig);
videoConfig = null;