how i can drwing on image box

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace MapStore
{
    public partial class Form1 : Form
    {
        #region dailg
        OpenFileDialog OpenFiledialog;
        //FileDialog OpenFiledialog;
     
        #endregion

        #region drwing
        Graphics g;
        Pen p = new Pen(Color.Blue, 2);
        Point strart;
        Point end;

        #endregion
        #region enums
        enum Enum_drwing  
        {
            line,
            recntlage
        }
        #endregion


        Int32 var_draw_case;


        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {

        }

        private void dockPanel1_Click(object sender, EventArgs e)
        {

        }

        private void openToolStripMenuItem_Click(object sender, EventArgs e)
        {
            OpenFiledialog = new OpenFileDialog();
            OpenFiledialog.Filter = "Image Files|*.jpg;*.gif;*.bmp;*.png;*.jpeg|All Files|*.*";
            OpenFiledialog.InitialDirectory =  "c:\\";
            OpenFiledialog.FilterIndex = 1;
            if (OpenFiledialog.ShowDialog() == DialogResult.OK )
            {
                pictureEdit1.Image = Image.FromFile(OpenFiledialog.FileName);

            }
        }

        private void panelControl1_Paint(object sender, PaintEventArgs e)
        {

        }

        private void exitToolStripMenuItem_Click(object sender, EventArgs e)
        {
            Application.Exit();
        }

        

        private void simpleButton2_Click(object sender, EventArgs e)
        {
            
        }

        private void pictureEdit1_MouseMove(object sender, MouseEventArgs e)
        {
            


            if ((var_draw_case == (int)Enum_drwing.line) &&  (e.Button == MouseButtons.Left))
            {
                pictureEdit1.Cursor = Cursors.Cross;
                 

                ControlPaint.DrawReversibleLine(pictureEdit1.PointToScreen(strart), pictureEdit1.PointToScreen(end), Color.Black);

                end = new Point(e.X, e.Y);

                ControlPaint.DrawReversibleLine(pictureEdit1.PointToScreen(strart), pictureEdit1.PointToScreen(end), Color.Black);



            }


            else

            {

                strart = new Point();

            }

        }

     


 
        

        private void BUT_drawline_Click(object sender, EventArgs e)
        {
            var_draw_case = (int)Enum_drwing.line;
        }

        private void pictureEdit1_MouseClick(object sender, MouseEventArgs e)
        {
            if (e.Button == MouseButtons.Left)
            {

                if ((var_draw_case == (int)Enum_drwing.line))
                {
                    strart.X = e.X;
                    strart.Y = e.Y;

                }
                else
                {
                    strart = new Point();
                }
               
            }
        }
        
      
    }
}