private void Form1_FormClosing(object sender, FormClosingEventArgs e)
 {
     if (JohnbeeSerialPort.MySerialPort.IsOpen)
     {
         JohnbeeSerialPort.SerialPort_Close();
     }
 }
 private void Comb_Bps_SelectedIndexChanged(object sender, EventArgs e)
 {
     if (JohnbeeSerialPort.SerialPort_Close() == 0)
     {
         btn_open.Text = "Open";
         JohnbeeSerialPort.Set_PortBps(Comb_Bps.Text);
     }
 }
 private void btn_open_Click(object sender, EventArgs e)
 {
     if (btn_open.Text == "Open")
     {
         if (JohnbeeSerialPort.SerialPort_Open() == 0)
         {
             btn_open.Text       = "Colse";
             Comb_Bps.Enabled    = false;
             Comb_Port.Enabled   = false;
             btn_Refresh.Enabled = false;
         }
     }
     else if (btn_open.Text == "Colse")
     {
         if (JohnbeeSerialPort.SerialPort_Close() == 0)
         {
             btn_open.Text       = "Open";
             Comb_Bps.Enabled    = true;
             Comb_Port.Enabled   = true;
             btn_Refresh.Enabled = true;
         }
     }
 }