how to forward and backward of a video.......?

private void Pan_Videoplay_Click(object sender, EventArgs e)
        {
            m_objMediaControl.Run();
        }

        private void webBrowser1_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)
        {

        }

        private void Pan_videopause_Click(object sender, EventArgs e)
        {
            m_objMediaControl.Pause();
        }

        private void Pan_videostop_Click(object sender, EventArgs e)
        {
            m_objMediaControl.Stop();
        }

        private void Pan_forward_Click(object sender, EventArgs e)
        {
            //m_objMediaPosition.CurrentPosition= m_objMediaPosition.CurrentPosition + TimeSpan.FromSeconds(10);
            m_objMediaPosition.CurrentPosition = m_objMediaPosition.CanSeekForward();

        }