how to Enable-Disable IE window

Hi all,

I am trying to enable or disable a particular IE window using EnableWindow win32 API using P/Invoke in my C# code.. This API requires to pass the handle of the window to be disabled or enabled. How can I get the Handle to a particular window?
I am trying to get all the processes running in my desktop using the Process.GetProcesses method and then by knowing the title of the window I am getting the handle of the process. but this handle to the process is changing every moment(I don't know why) and I think this handle to the process and hanle to the window is different thing. the code which I am using is as bellow :

Code:

---

        private void button3_Click(object sender, System.EventArgs e)
                {
                        Process [] allProcs = Process.GetProcessesByName("iexplore");
 
                        listBox1.Items.Clear() ;
                        foreach(Process ps in allProcs)
                        {
                                int index = listBox1.Items.Add( ps.ProcessName + " : " + ps.MainWindowTitle + " : " + ps.Handle) ;


                        }                   

                }

                private void button4_Click(object sender, System.EventArgs e)
                {
                        if(listBox1.SelectedIndex <= 0)
                        {
                                return ;
                        }
                        int selIndex = listBox1.SelectedIndex ;

                        //get the handle of the selected item
                        string selItem = (string)listBox1.Items[selIndex] ;

                        MessageBox.Show(selItem) ;

                        string[] selProcessData = selItem.Split(new char[]{':'}) ;

                        int iHnadle = int.Parse( selProcessData[2].ToString().Trim()) ;

                        isProcessEnabled = EnableWindow((IntPtr)iHnadle, !(isProcessEnabled)) ;
                }
        }

---

I think I am much clear about the problem. Can anybody please help me...

thanks in advance...