C# WebBrowser

        private void Form1_Load(object sender, EventArgs e)
        {
            this.webBrowser1.Navigate(Application.StartupPath + @"HTMLPage1.htm");
        }
        private void webBrowser1_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)
        {
            HtmlDocument htmlDocument = webBrowser1.Document;
            HtmlElement btnElement = htmlDocument.All["Button1"];

            if (btnElement != null)
            {
                btnElement.Click += new HtmlElementEventHandler(btnElement_Click);
            }
            btnElement = htmlDocument.All["Button2"];
            if (btnElement != null)
            {
                btnElement.Click += new HtmlElementEventHandler(btnElement_Click);
            }
        }

        public void btnElement_Click(object sender, HtmlElementEventArgs e)
        {
            HtmlElement element = sender as HtmlElement;

            if (element.Id == "Button1")
            {
                MessageBox.Show("第一个按钮");
　　　　　　　　　　System.Diagnostics.Process.Start("explorer.exe", "http://www.baidu.com");
            }
            else if (element.Id == "Button2")
            {
                MessageBox.Show("第二个按钮");
　　　　　　　　　System.Diagnostics.Process.Start(@"C:UsersFishDesktopDebugWindowsFormsApplication1.exe");
            }

            
        }