webBrowser 事件委托怎么引用之前的对象

webBrowser 事件委托如何引用之前的对象？
 public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
            Control.CheckForIllegalCrossThreadCalls = false;
            this.webBrowser1.Navigate("about:blank"); (this.webBrowser1.ActiveXInstance as SHDocVw.WebBrowser).NewWindow2 += new SHDocVw.DWebBrowserEvents2_NewWindow2EventHandler(Form1_NewWindow2);
            this.webBrowser1.Navigate("http://127.0.0.1/");
            //if (this.webBrowser1.ReadyState == WebBrowserReadyState.Complete) { this.Text = webBrowser1.DocumentTitle; }  
             
        
        }
      
        
        public void Form1_NewWindow2(ref object ppDisp, ref bool Cancel)
        {
            Form1 frm = new Form1(); 
            ppDisp = frm.webBrowser1.ActiveXInstance;
            //frm.webBrowser1.ScrollBarsEnabled = true;
            frm.StartPosition = FormStartPosition.CenterParent;
            frm.Width = 880;
            frm.Height = 580;
            frm.Show();
            frm.webBrowser1.DocumentCompleted += new WebBrowserDocumentCompletedEventHandler(webBrowser1_DocumentCompleted);
        }
       
        public void webBrowser1_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)
        {
                我想在这里获取设置frm.Text属性，但不知道怎么样获取这个对象     }
 

    } webBrowser?事件对象传递?
[解决办法]
Form1 frm=null;
public void Form1_NewWindow2(ref object ppDisp, ref bool Cancel)
         {
             frm = new Form1(); 
             ppDisp = frm.webBrowser1.ActiveXInstance;
             frm.StartPosition = FormStartPosition.CenterParent;

             frm.Width = 880;
             frm.Height = 580;
             frm.Show();
             frm.webBrowser1.DocumentCompleted += new WebBrowserDocumentCompletedEventHandler(webBrowser1_DocumentCompleted);
         }