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

namespace WindowsApplication1
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
this.textBox1.KeyDown += new System.Windows.Forms.KeyEventHandler(this.textBox1_KeyDown);
}

private void textBox1_KeyDown(object sender, System.Windows.Forms.KeyEventArgs e){
// Determine whether the key entered is the Enter key. If it is, go to url in text box.
if (e.KeyCode == Keys.Enter)
{
//button1 = this.button1_Click;
webBrowser1.Navigate(textBox1.Text);
}
}

private void button1_Click(object sender, EventArgs e)
{
string address1;
address1 = textBox1.Text;
webBrowser1.Navigate(address1);
}

private void button2_Click(object sender, EventArgs e)
{
webBrowser1.Navigate("yahoo.com", false);
}

private void button3_Click(object sender, EventArgs e)
{
webBrowser1.Navigate("google.com", false);
}
}
}