private void StartScan(bool reScan)
{
if (toolStripComboBoxSource.SelectedIndex > -1)
{
EnableControls(true, false);
GallerySource source = (GallerySource)((ComboBoxItem)toolStripComboBoxSource.SelectedItem).Tag;
RemoveTreeNodes(source.RootFolder);
_worker.ScanSource(source, reScan);
}
}