protected override void OnShown(EventArgs e)
        {
            base.OnShown(e); 
            this.radWebCam1.Resize += RadWebCam1_Resize; 
        }


        Timer t = new Timer();
        bool isPaused = false;
        private void RadWebCam1_Resize(object sender, EventArgs e)
        {
            t.Stop();
            if (isPaused)
            {
                t = new Timer();
                t.Interval = 100;
                t.Tick += T_Tick; 
                this.radWebCam1.Start();
                t.Start();
            } 
        }

        private void T_Tick(object sender, EventArgs e)
        {
            this.radWebCam1.Pause();
            isPaused = true;
            t.Stop();
        }
        protected override bool ProcessCmdKey(ref Message msg, Keys keyData)
        {
            if (keyData == Keys.Space)
            {
                this.radWebCam1.Pause();
                isPaused = true;
            }

            return base.ProcessCmdKey(ref msg, keyData);
        }