how to run a video clip

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C#

C#4.0

i have the following code of a simple function , having no error, but does not show any message..
any one can help ?? please

public  void runPlayer()
       {

           double  totalframe;
           double currentframe;

           cap = new Capture(openFileDialog1.FileName);

           totalframe = cap.GetCaptureProperty(Emgu.CV.CvEnum.CAP_PROP.CV_CAP_PROP_FRAME_COUNT);
           currentframe = cap.GetCaptureProperty(Emgu.CV.CvEnum.CAP_PROP.CV_CAP_PROP_POS_FRAMES);
           while (currentframe <= totalframe )
           {
               if (playerImage.InvokeRequired)
               {

                   Bitmap img = new Bitmap(cap.RetrieveBgrFrame().ToBitmap());

                   //img  = cap.RetrieveBgrFrame().ToBitmap();
                   this.playerImage.Image = img;
                   playerImage.Show();
                   currentframe++;
                   CvInvoke.cvWaitKey(33);
               }
           }


       }