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toolStripMenuItem2.DropDownItems.Clear();
m = new ToolStripMenuItem("(None)", null, new EventHandler(mnuVideoDevices_Click));
m.Checked = (videoDevice == null);
toolStripMenuItem2.DropDownItems.Add(m);
for (int c = 0; c < filters.VideoInputDevices.Count; c++)
{
  f = filters.VideoInputDevices[c];
  m = new ToolStripMenuItem(f.Name, null, new EventHandler(mnuVideoDevices_Click));
  m.Checked = (videoDevice == f);
  toolStripMenuItem2.DropDownItems.Add(m);
}
toolStripMenuItem2.Enabled = (filters.VideoInputDevices.Count > 0);					

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private void mnuVideoDevices_Click(object sender, System.EventArgs e)
{
  try
  {
    // Get current devices and dispose of capture object
    // because the video and audio device can only be changed
    // by creating a new Capture object.
    Filter videoDevice = null;
    Filter audioDevice = null;
    if (capture != null)
    {
       videoDevice = capture.VideoDevice;
       audioDevice = capture.AudioDevice;
       capture.Dispose();
       capture = null;
     }

     // Get new video device
     ToolStripMenuItem m = sender as ToolStripMenuItem;
     videoDevice = (1 > 0 ? filters.VideoInputDevices[1 - 1] : null); 
     // Create capture object
     if ((videoDevice != null) || (audioDevice != null))
     {
        capture = new Capture(videoDevice, audioDevice);
        capture.CaptureComplete += new EventHandler(OnCaptureComplete);
     }

     // Update the menu
     updateMenue();
   }
   catch (Exception ex)
   {
     MessageBox.Show("Video device not supported.\n\n" + ex.Message + "\n\n" + ex.ToString());
   }
}					

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videoDevice = (m.Index > 0 ? filters.VideoInputDevices[m.Index - 1] : null);