private void tb_ValueChanged(object sender, EventArgs e)
{
int index = RSSIListView.GetTBControlIndex((TrackBar)sender);
if (index >= 0)
{
TrackBar tb = (TrackBar)RSSIListView.GetTBEmbeddedControl(3, index);
RSSIListView.Items[index].SubItems[3].Text = tb.Value.ToString();
}
}