Hello all,

I am learning myself c sharp and for that I have been working on a drawing program where the user is capable of drawing lines in 3 different strokes and 4 different colors,

My first problem is how to let the user make a line by 2 mouseclicks on the panel.

This is the code I have so far:
Namespace WindowsFormsApplication1

Code:

---

namespace WindowsFormsApplication1{
public partial class Form1 : Form
    {
        Graphics e;
        Pen p;
        Point punt1, punt2;
        int nPunt = 0;

       
        public Form1()
        {
            InitializeComponent();
           
            p = new Pen(Color.Black);
        }

        public void tekenpaneel_MouseClick(object sender, MouseEventArgs e)
        {
            if (nPunt == 0)
            {
                punt1 = new Point(e.X, e.Y);
                nPunt++;
            }
            else if (nPunt == 1)
            {
                punt2 = new Point(e.X, e.Y);
                nPunt = 0;
            }
        }

public void tekenpaneel_Paint(object sender, PaintEventArgs e)
        {
            e.Graphics.DrawLine( p, punt1, punt2);
        }

    }
}

---

I don't got any errors but the program isn't doing anything when I click on the panel, I would be verry gratefull if someone could help me out :)

OK now a quick update of how my code is now so its easier to help me :)
Already a big thanks, getting to really understand csharp now :D

Code:

---

namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        public int A, B, X, Y;
        public Color m_Color;
        public Point punt1;
        public Point punt2;
        public int nPunt;

        public Form1()
        {
            InitializeComponent();
        }
        public void tekenpaneel_MouseClick(object sender, MouseEventArgs e)
        {
            if (nPunt == 0)
            {
                punt1 = new Point(e.X, e.Y);
                nPunt++;
            }
            else if (nPunt == 1)
            {
                punt2 = new Point(e.X, e.Y);
                nPunt = 0;
            }
        }

        private void zwartBtn2_CheckedChanged(object sender, EventArgs e)
        {
            m_Color = Color.Black;
        }

        private void roodBtn2_CheckedChanged(object sender, EventArgs e)
        {
            m_Color = Color.Red;
        }

        private void geelBtn2_CheckedChanged(object sender, EventArgs e)
        {
            m_Color = Color.Yellow;
        }

        private void blauwBtn2_CheckedChanged(object sender, EventArgs e)
        {
            m_Color = Color.Blue;
        }
       
        public void tekenpaneel_Paint(object sender, PaintEventArgs e)
        {
            e.Graphics.DrawLine(new Pen(m_Color, 2), punt1, punt2);
        }
     
    }
}

---

I get no errors but no lines either... any help would be welcome :) THANKS!