Controling Primary Form from Secondary

Question

i have been on application that consist of two forms

1st Form = Primary Form
2nd Form = Secondary Form ( Consists of three Track bars with names R, G ,B)

i m trying for few days to change the Background Color of Primary form simultaneously , whenever i move the trackbar in Secondary form

Problem:
 i used .Show() to get hold of Primary form,  and from secondary form ,i m able to change color of Primary Form but the Problem is that .Show() pops up the new primary form every time i move the trackbar

is there a way through which i can send trackbar values to Primary form and can change the Background Color of Primary Form ,


the link to my application is here

[html]http://www.4shared.com/get/314190370/5ec62112/color_2_forms.html[/html]


please help me , i need to implement this behavior in my assignment

Form1 = Blank Form ( i want to change Form1 Color )

Form2 Code is given below ( Consists of Three Track bar )

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Runtime.InteropServices;

using System.Linq;

using System.Text;

using System.Windows.Forms;



namespace color_2_forms

{

    public partial class Form2 : Form

    {

        public Form2()

        {

            InitializeComponent();

            

        }

        

        public void UpdateMe()

        {

            Form1 frm = new Form1();

            

            

                frm.Show();



                int R = trackBar1.Value;

                int G = trackBar2.Value;

                int B = trackBar3.Value;



            frm.BackColor = Color.FromArgb(R,G,B);



            textBox1.Text = " ( " + trackBar1.Value.ToString() + " , " 

                                + trackBar2.Value.ToString() +","

                            + trackBar3 .Value .ToString () + " ) ";

        }



        private void trackBar1_Scroll(object sender, EventArgs e)

        {

            Form1 frm = new Form1();

            UpdateMe();

        }



       private void trackBar2_Scroll(object sender, EventArgs e)

       {

            Form1 frm = new Form1();

            UpdateMe();

       }

       

       private void trackBar3_Scroll(object sender, EventArgs e)

       {

           Form1 frm = new Form1();

            UpdateMe();

       }







        

    }

}



 

Please HELP me