private void bRfSet_Click(object sender, EventArgs e) { byte pwr = 0; byte freq = 0; int status; pwr = (byte)(tRfPwr.Value); freq = (byte)(cRfFreq.SelectedIndex); status = Api.SetRf(pwr, freq); if (status != 0) { lInfo.Items.Add("Set Rf settings failed!"); return; } lInfo.Items.Add("Set Rf settings success!"); }