static void selectWebCam(final VF1<Webcam> onSelect) {
  L<Webcam> webcams = new L(Webcam.getWebcams());
  final JComboBox cbCams = jcombobox(mapMethod(f getName, webcams));
  showTitledForm("Select WebCam",
    cbCams, r {
      callF(onSelect, webcams.get(getSelectedIndex(cbCams)));
    });
}