Notepad search functionality

Few months back, I had a problem of coding Find functionality in C#. I should work like notepad Find dailog box.

I used SetForegroundWindow(...), Actually this is not dialogbox, also this is not seperate window. Perhaps this is called from main window as objSubForm.Show(this).

the Idea I got from
http://www.codeguru.com/forum/showthread.php?t=417099&highlight=Find+Functionality+Notepad
Hereby I am presenting sample code behind this.

      1.   Create windows application, add one more new  form to this project.
      2.   Declare one emplty object for second from.
                        Test.Form2 frm; // Test is namespace
      3.   In the constructor of main from create instance for second from like
                       ex. frm = new Test.Form2(this);  
      4.  In the second from you need to define on perameterised constructor and the parameter should be the object of main form 
      5. The second form code will be like

using System.Runtime.InteropServices;

namespace Test
{
    public partial class Form2 : Form
    {
        Test.Form1 m_frm=null;
        [DllImport("user32.dll")] private static extern
            bool SetForegroundWindow(IntPtr hWnd);
       
        public Form2(Test.Form1 frm)
        {
            m_frm = frm;
            InitializeComponent();
        }
    }
}

       6. In main from Find event the code should be

frm.Show(this);