How to disable cursor in textbox?

In C#, you can use the following read-only textbox:

public class ReadOnlyTextBox : TextBox
{
    [DllImport("user32.dll")]
    static extern bool HideCaret(IntPtr hWnd);

    public ReadOnlyTextBox()
    {
        this.ReadOnly = true;
        this.BackColor = Color.White;
        this.GotFocus += TextBoxGotFocus;
        this.Cursor = Cursors.Arrow; // mouse cursor like in other controls
    }

    private void TextBoxGotFocus(object sender, EventArgs args)
    {
        HideCaret(this.Handle);
    }
}