Auto Scroll TextBox

Hi, Experts
I want to create a auto scroll Textbox in C#. But I dont know how to make text box scroll by coding.

Please, help me.

you could do it with API:

Code:

---

//add this
using System.Runtime.InteropServices;

//then the code is:
public partial class Form1 : Form
{
    [DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = false)]
    static extern IntPtr SendMessage(IntPtr hWnd, uint Msg, IntPtr wParam, IntPtr lParam);

    const int EM_LINESCROLL = 0xB6;

    public Form1()
    {
        InitializeComponent();
        for (int n = 0; n < 20; n++)
        {
            textBox1.Text += (n.ToString() + Environment.NewLine);
        }
    }

    private void button1_Click(object sender, EventArgs e)
    {
        // scroll up
        SendMessage(textBox1.Handle, EM_LINESCROLL, IntPtr.Zero, (IntPtr)(-1));
    }

    private void button2_Click(object sender, EventArgs e)
    {
        // scroll down
        SendMessage(textBox1.Handle, EM_LINESCROLL, IntPtr.Zero, (IntPtr)1);
    }
}

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I believe.. because John has said it 3,793 times.. that.. if you use append text it autoscrolls to where the text is.. if that's what you want