C# winform 中的webBrowser1的网站打开后 怎么让弹窗在webBrowser2里面显示 而不是在IE浏览器显示 ！

///

/// 单击网页菜单时两边都会变
/// 其它的可以直接显示在webBrowser2
///

public partial class MainForm : Form
{
public MainForm()
{
InitializeComponent();

this.webBrowser1.Url = new System.Uri("http://www.sina.com.cn", System.UriKind.Absolute);
this.webBrowser1.NewWindow += new System.ComponentModel.CancelEventHandler(this.web_NewWindow);
this.webBrowser1.Navigating +=new WebBrowserNavigatingEventHandler(webBrowser1_Navigating);
}

string newURL;

private void web_NewWindow(object sender, CancelEventArgs e)
{

newURL = webBrowser1.StatusText.ToString();

// newURL = webBrowser1.Document.ActiveElement.GetAttribute("href");

Uri newurl = new Uri(newURL);

this.webBrowser2.Url = newurl;
this.webBrowser2.Refresh();
e.Cancel = true;

}

private void webBrowser1_Navigating(object sender, WebBrowserNavigatingEventArgs e)
{
newURL = webBrowser1.StatusText.ToString();

// newURL = webBrowser1.Document.ActiveElement.GetAttribute("href");

Uri newurl = new Uri(newURL);

this.webBrowser2.Url = newurl;
this.webBrowser2.Refresh();

}

}

webBrowserContext.Navigate("http://www.baidu.com");