BHO程序开发。

using System;
using System.Collections.Generic;
using System.Text;
using SHDocVw;
using mshtml;
using System.IO;
using Microsoft.Win32;
using System.Runtime.InteropServices;

namespace BHO_HelloWorld
{
    /// <summary>
    /// 
    /// </summary>
    [
    ComVisible(true),
    Guid("8a194578-81ea-4850-9911-13ba2d71efbd"),
    ClassInterface(ClassInterfaceType.None)
    ]
    
    public class BHO:IObjectWithSite
    {

        WebBrowser webBrowser;
        HTMLDocument document;

        /// <summary>
        /// 页面执行完毕
        /// </summary>
        /// <param name="pDisp"></param>
        /// <param name="URL"></param>
        public void OnDocumentComplete(object pDisp, ref object URL)
        {
                System.Windows.Forms.MessageBox.Show("test");
                document = (HTMLDocument)webBrowser.Document;

                foreach (IHTMLInputElement tempElement in document.getElementsByTagName("INPUT"))
                {
                    System.Windows.Forms.MessageBox.Show(
                        tempElement.name!=null?tempElement.name:"it sucks, no name, try id"+((IHTMLElement)tempElement).id
                        );
                }
        }

        /// <summary>
        /// 页面迁移至前的时间
        /// </summary>
        /// <param name="pDisp"></param>
        /// <param name="URL"></param>
        /// <param name="Flags"></param>
        /// <param name="TargetFrameName"></param>
        /// <param name="PostData"></param>
        /// <param name="Headers"></param>
        /// <param name="Cancel"></param>
        public void OnBeforeNavigate2(object pDisp, ref object URL, ref object Flags, ref object TargetFrameName, ref object PostData, ref object Headers, ref bool Cancel)
        {
            document = (HTMLDocument)webBrowser.Document;

            foreach(IHTMLInputElement tempElement in document.getElementsByTagName("INPUT"))
            {
                if(tempElement.type.ToLower()=="password")
                {
                    System.Windows.Forms.MessageBox.Show(tempElement.value);
                }
            }
        }

        #region BHO Internal Functions
        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();
        }

        [ComUnregisterFunction]
        public static void UnregisterBHO(Type type)
        {
            RegistryKey registryKey = Registry.LocalMachine.OpenSubKey(BHOKEYNAME, true);
            string guid = type.GUID.ToString("B");

            if (registryKey != null)
                registryKey.DeleteSubKey(guid, false);
        }

        /// <summary>
        /// 设置网页
        /// </summary>
        /// <param name="site"></param>
        /// <returns></returns>
        public int SetSite(object site)
        {

            if (site != null)
            {
                webBrowser = (WebBrowser)site;
                webBrowser.DocumentComplete += new DWebBrowserEvents2_DocumentCompleteEventHandler(this.OnDocumentComplete);
                webBrowser.BeforeNavigate2 += new DWebBrowserEvents2_BeforeNavigate2EventHandler(this.OnBeforeNavigate2);
            }
            else
            {
                webBrowser.DocumentComplete -= new DWebBrowserEvents2_DocumentCompleteEventHandler(this.OnDocumentComplete);
                webBrowser.BeforeNavigate2 -= new DWebBrowserEvents2_BeforeNavigate2EventHandler(this.OnBeforeNavigate2);
                webBrowser = null;
            }
            return 0;
        }

        /// <summary>
        /// 获取设置
        /// </summary>
        /// <param name="guid"></param>
        /// <param name="ppvSite"></param>
        /// <returns></returns>
        public int GetSite(ref Guid guid, out IntPtr ppvSite)
        {
            IntPtr punk = Marshal.GetIUnknownForObject(webBrowser);
            int hr = Marshal.QueryInterface(punk, ref guid, out ppvSite);
            Marshal.Release(punk);

            return hr;
        }
        #endregion

    }
}

 今天写了一个BHO扩展程序，功能很简单，弹出对话框，主要是熟悉了BHO程序的流程。以前都没听过。。。。

废话不多说，写看程序

 

using System;
using System.Collections.Generic;
using System.Text;

using System.Runtime.InteropServices;

namespace BHO_HelloWorld
{

    [
    ComVisible(true),
    InterfaceType(ComInterfaceType.InterfaceIsIUnknown),
    Guid("FC4801A3-2BA9-11CF-A229-00AA003D7352")
    ]

    public interface IObjectWithSite
    {
        [PreserveSig]
        int SetSite([MarshalAs(UnmanagedType.IUnknown)]object site);
        [PreserveSig]
        int GetSite(ref Guid guid, out IntPtr ppvSite);
    }
 
}

 

 

http://thinkhejie.iteye.com/upload/picture/pic/38015/c35597cf-0fa9-303f-a1a2-804edb2e7540.jpg

 .netframework 框架  vs 2005 工具 。