private void Rate_Scroll(object sender, EventArgs e) { try { TrackBar comboBox = (TrackBar)sender; int selected = comboBox.Value; m_objPlaylist.FileRateSet(selected); double rate; m_objPlaylist.FileRateGet(out rate); label2.Text = rate.ToString(); } catch (Exception ex) { MessageBox.Show(ex.ToString() + " --Method Rete_scroll"); } }