Drawing on panel in proper layout.

You Can Use this code for line and columns also------------
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;

namespace WindowsApplication3
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        int y;
        int x;
        private void panel1_MouseClick(object sender, MouseEventArgs e)
        {
            Point p = new Point(e.Y, e.X);
            x = p.X;
            y = p.Y;
            panel1.Invalidate();
        }

        private void panel1_Paint(object sender, PaintEventArgs e)
        {
            Graphics g = panel1.CreateGraphics();
            Pen p = new Pen(Color.Black);
            if (listBox1.SelectedIndex == 0)
            {
                SolidBrush sb = new SolidBrush(Color.Red);
                g.DrawEllipse(p, x - 50, y - 50, 100, 100);
                g.FillEllipse(sb, x - 50, y - 50, 100, 100);
            }
            if (listBox1.SelectedIndex == 1)
            {
                SolidBrush sb = new SolidBrush(Color.Red);
                g.DrawRectangle(p, x - 50, y - 50, 100, 100);
                g.FillRectangle(sb, x - 50, y - 50, 100, 100);
            }
        }
    }
}