private void btnCloseSerial2_Click(object sender, EventArgs e) { mf.CloseGPS2Port(); if (mf.spGPS2.IsOpen) { cboxBaud2.Enabled = false; cboxPort2.Enabled = false; btnCloseSerial2.Enabled = true; btnOpenSerial2.Enabled = false; } else { cboxBaud2.Enabled = true; cboxPort2.Enabled = true; btnCloseSerial2.Enabled = false; btnOpenSerial2.Enabled = true; } }