test-code

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 test
{
    public partial class Form1 : Form
    {
        string google_q;
        List<string> history = new List<string>();
        bool dont_add_history = true;//dont add to history the first time

        public Form1()
        {
            google_q = "http://google.com/search?q=cache:";
            InitializeComponent();
        }
        private void Form1_Load(object sender, EventArgs e)
        {
            webBrowser1.Navigate(google_q + "http://hackforums.net");
        }
        private void webBrowser1_Navigating(object sender, WebBrowserNavigatingEventArgs e)
        {
            string path = e.Url.OriginalString;// e.Url.PathAndQuery;
            string host = textBox1.Text.StartsWith("http://") ? textBox1.Text.Substring(7) : textBox1.Text;
            host = (host.Contains("/") ? host.Substring(0, host.IndexOf('/')) : host);
            host = host.StartsWith("www.") ? host.Substring(4) : host;

            if (!path.StartsWith(google_q) && path.Contains(host))
            {
                webBrowser1.Navigate(google_q + path);
                e.Cancel = true;
            }
            else if (path.Contains(host))
            {
                textBox1.Text = e.Url.OriginalString.Substring(google_q.Length);
                if (!dont_add_history)//clicked back, dont add to history
                {
                    history.Add(google_q + textBox1.Text);
                    listView1.Items.Insert(0, new ListViewItem(textBox1.Text));
                }
            }
        }
        private void webBrowser1_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)
        {
            if (dont_add_history)
                dont_add_history = false;
        }
        private void textBox1_KeyDown(object sender, KeyEventArgs e)
        {
            if (e.KeyCode == Keys.Enter)
                webBrowser1.Navigate(google_q + textBox1.Text);
        }
        private void button1_Click(object sender, EventArgs e)
        {
            dont_add_history = true;
            if (history.Count <= 1)
                return;
            listView1.Items.RemoveAt(0);
            history.RemoveAt(history.Count - 1);
            webBrowser1.Navigate(history[history.Count-1]);
        }
        private void button2_Click(object sender, EventArgs e)
        {
            dont_add_history = true;
            webBrowser1.Navigate(textBox1.Text);
        }
        private void listView1_SelectedIndexChanged(object sender, EventArgs e)
        {
            if (listView1.SelectedItems.Count == 0)
                return;
            int index = listView1.SelectedItems[0].Index;
            for (int i=0; i<index; i++)//removing previous history
                listView1.Items.RemoveAt(0);

            dont_add_history = true;
            webBrowser1.Navigate(google_q + listView1.SelectedItems[0].Text);
        }
    }
}