C#

bool Receive_Enable = false;

public Terminal (SerialPort Serial_Port)
        {
            InitializeComponent ();
            _SerialPort = Serial_Port;
            _SerialPort.Open (); // **** IF IT ISN'T ALREADY OPENED BY THE CALLING CODE.
            _SerialPort.DataReceived += new SerialDataReceivedEventHandler (Port_DataReceived);
        }

private void Start_Click (object sender, EventArgs e)
        {
            if(Start.Text == "Start")
            {
                Start.Text = "Stop";
                Receive_Enable = true;
            }
            else
            {
                Receive_Enable = false;
                Start.Text = "Start";
            }
        }

private void Port_DataReceived (object sender, SerialDataReceivedEventArgs e)
        {
            if(Receive_Enable)
            {
                int bytes = _SerialPort.BytesToRead;
                byte[] data = new byte[bytes];
                _SerialPort.Read(data, 0, bytes);
                string s = System.Text.Encoding.ASCII.GetString(data);
                Console.WriteLine(s);
                rtbTerminal.AppendText(s);
                rtbTerminal.ScrollToCaret();
            }
        }

SerialPort.Close()

ReadExisting()

stream = port.BaseStream  ;
...
byte[] buffer = new byte [ port.ReadBufferSize ] ;
...
stream.Read ( buffer , 0 , buffer.Length ) ;

deebow wrote:

This user control is placed on a base form and now the form inherits this user control.

BillWoodruff wrote:

once you have put an instance of the UserControl on the "base form:" changing the design-time appearance of the UserControl would not update the appearance of the instance of the UserControl on the base form.

 B) Form that contains an instance of Usercontrol A
Class FormWhatever : UserControl

2) The form that is loaded at program start is the usercontrol.

The base control isn't loaded unless the user chooses to go into that form.

Member 10270825 wrote:

can't Rows

Parent Class
{
    //code
}
Child Class : Parent 
{
    //code
}
Grandchild Class : Child
{
    //code
}
GreatGrandchild Class : Grandchild 
{
    //code
}

public class Parent
{
    public virtual void FunctionOne()
    {
    }
}
...
public class GreatGrandChild : GrandChild
{
    public override void FunctionOne()
    {
         Console.WriteLine("Called in GreatGrandChild");
         base.FunctionOne();
    }
}