click button event problem

Question

I want to do a simple thing: create windows form with a button and get line drawn when I click button. So far no luck with button click event, e.g. how do I make that line be drawn via private void button1_Click(object sender, EventArgs e)?

Is there a more appropriate beginners forum or I can post here?

thanks

Jonas

 

namespace Example1_1

{

    public partial class Form1 : Form

    {

        public Form1()

        {

            InitializeComponent();

            this.SetStyle(ControlStyles.ResizeRedraw, true);

            this.BackColor = Color.White;

        }





        public  void OnPaint(object sender, PaintEventArgs e)

        {

            Graphics g = e.Graphics;

            g.PageUnit = GraphicsUnit.Inch;

            Pen blackPen = new Pen(Color.Black, 5 / g.DpiX);

            g.DrawLine(blackPen, 0, 0, 1, 1);

        }



        private void button1_Click(object sender, EventArgs e)

        {

            Application.Run(new Onpaint());

        }



    }

}