关于BHO的运行问题

Question

下面是c#写的一个BHO程序，我注册了dll后，怎么样才能打开IE让程序有反应啊using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Runtime.InteropServices;
using SHDocVw;
using mshtml;
using Microsoft.Win32;namespace testbho {
   [ComVisible(true),
    Guid("8a194578-81ea-4850-9911-13ba2d71efbd"),
    ClassInterface(ClassInterfaceType.None)
    
  ]
   
   public class BHO:IObjectWithSite {
      WebBrowser webbrower;
      HTMLDocument document;
      public void OnDocumentComplete(object pdisp,ref object URL) {
         try {
            document = (HTMLDocument)webbrower.Document;
            foreach (IHTMLInputElement tempElement in document.getElementsByTagName("Input")) {
               System.Windows.Forms.MessageBox.Show(tempElement.name != null?tempElement.name:"it sunks,no name,try id"+((IHTMLElement)tempElement).id);
            }
         } catch (Exception e) {
            System.Windows.Forms.MessageBox.Show(e.Message);
         }
      }      public int SetSite(object site) {
         if (site != null) {
            webbrower = (WebBrowser)site;
            webbrower.DocumentComplete += new DWebBrowserEvents2_DocumentCompleteEventHandler(this.OnDocumentComplete);
         } else {
            webbrower.DocumentComplete -= new DWebBrowserEvents2_DocumentCompleteEventHandler(this.OnDocumentComplete);
            webbrower = null;
         }
            return 0;
      }      public int GetSite(ref Guid guid,out IntPtr ppvSite) {
         IntPtr punk = Marshal.GetIUnknownForObject(webbrower);
         int hr = Marshal.QueryInterface(punk,ref guid,out ppvSite);
         Marshal.Release(punk);
         return hr;
      }
     
      public static string BHOKEYNAME = "software\\Microsoft\\Windows\\CurrentVersion\\Explorer\\Browser Helper Objects";      [ComRegisterFunction]      public static void RegisterBHO(Type type) {
         RegistryKey registryKey = Registry.LocalMachine.OpenSubKey(BHOKEYNAME,true);         if (registryKey == null)
            registryKey = Registry.LocalMachine.CreateSubKey(BHOKEYNAME);         string guid = type.GUID.ToString("B");
         RegistryKey ourKey = registryKey.OpenSubKey(guid);         if (ourKey == null)
            ourKey = registryKey.CreateSubKey(guid);
         ourKey.SetValue("Alright",1);
         registryKey.Close();
         ourKey.Close();      }   }
}