how draw this straight line between two usercontrol at runtime?

Question

hi
i have some code that draw straight line between two usercontrol at design mode
now i want draw line at runtime mode;

how can i change the code to it?
my form codes is :

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

namespace CCD
{
    public partial class Form3 : Form
    {
        UserControl1 UserControl1 = new UserControl1();
        private int ST_X, ST_Y, ED_X, ED_Y , index = 1;
        private bool Clicked = false;
        public bool LINE = false;
        private string CtrlName;

        public Form3()
        {
            InitializeComponent();            
        }

        private void DrawLine(int sx, int sy, int ex, int ey)
        {
            Graphics G = this.CreateGraphics();
            Pen P = new Pen(Color.Red, 1);
            Point p1 = new Point(sx, sy);
            Point p2 = new Point(ex, ey);
            G.DrawLine(P, p1, p2);
            P.Dispose();
        }

        private void Form3_Load(object sender, EventArgs e)
        {
            Helper.ControlMover.Init(UserControl1);
        }

        private void button1_Click(object sender, EventArgs e)
        {
            index += 1;
            UserControl1 = new UserControl1();
            this.Controls.Add(UserControl1);
            Helper.ControlMover.Init(UserControl1);
            CtrlName = "UsrCtrl" + index;
            UserControl1.Name = CtrlName;
            textBox1.Text = UserControl1.Name.ToString();
            
        }

        private void button2_Click(object sender, EventArgs e)
        {
            LINE = true;
        }
        
        public void LINEPOINTS(object sender, EventArgs e)
        {
            UserControl user = new UserControl();
                if (!Clicked)
                {
                    Clicked = true;
                    ST_X = user.Location.X;
                    ST_Y = user.Location.Y;
                }
                else
                {
                    ED_X = user.Location.X;
                    ED_Y = user.Location.Y;
                    textBox1.Text = ED_Y.ToString();
                    Clicked = false;
                }
            }
    }
}

and my user control codes is :

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

namespace CCD
{
    public partial class UserControl1 : UserControl
    {
        public int ST_X, ST_Y, ED_X, ED_Y;
        public Point loc;
        private bool Clicked = false;

        public UserControl1()
        {
            InitializeComponent();
          //  this.Click += new System.EventHandler(this.myEven);
        }

        private void myEven(object sender, System.EventArgs e)
        {
           /* if (!Clicked)
            {
                Clicked = true;
                ST_X = this.Location.X;
                ST_Y = this.Location.Y;
            }
            else
            {
                ED_X = this.Location.X;
                ED_Y = this.Location.Y;
                Clicked = false;
            }*/

            loc.X = this.Location.X;
            loc.Y = this.Location.Y;
        }

        private void DrawLine(int sx, int sy, int ex, int ey)
        {
            Graphics G = this.CreateGraphics();
            Pen P = new Pen(Color.Red, 1);
            Point p1 = new Point(sx, sy);
            Point p2 = new Point(ex, ey);
            G.DrawLine(P, p1, p2);
            P.Dispose();
        }

        private void hotspot1_MouseHover(object sender, EventArgs e)
        {
            hotspot1.BorderStyle = BorderStyle.FixedSingle;
        }

        private void hotspot1_MouseLeave(object sender, EventArgs e)
        {
            hotspot1.BorderStyle = BorderStyle.None;
        }

        private void hotspot1_Click(object sender, EventArgs e)
        {
            
        }

        private void UserControl1_Click(object sender, EventArgs e)
        {
           // this.myEven(sender, e);
            Form3 F = new Form3();
            F.LINEPOINTS(sender,e);
            
        }
    }
}

any idea?
thanks