C#编的API例程 网页SPY（提取网页元素）

【实例简介】

C#编的API例程 网页SPY

【实例截图】

【核心代码】

/*      程序名称：网页SPY(C#版)
 *          作者：ecjob   (86年出生,广东 寻 女人/项目/工作)
 *          日期：2008-10-18
 * */
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;

using System.IO;
using System.Runtime.InteropServices;
using mshtml;

namespace WebSpy
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        #region DLL函数
        [DllImport("user32.dll", EntryPoint = "SetCapture")]
        public static extern int API_置鼠标到捕获窗口(IntPtr hwnd窗口句柄);
        [DllImport("user32.dll", EntryPoint = "ReleaseCapture")]
        public static extern int API_释放鼠标();

        [DllImport("user32", EntryPoint = "RegisterWindowMessage")]
        public static extern int API_注册字符串消息(string lpString);

        //注意这个函数ObjectFromLresult的声明.
        [DllImport("OLEACC.DLL", EntryPoint = "ObjectFromLresult")]
        public static extern int API_取IEDocument(int lResult, ref System.Guid riid, int wParam,
                                                   [MarshalAs(UnmanagedType.Interface), In, Out]ref Object ppvObject);

        [DllImport("user32.dll", EntryPoint = "WindowFromPoint")]
        public static extern IntPtr  API_取坐标窗口句柄(Point point);

        [DllImport("user32.dll", EntryPoint = "SendMessageTimeout")]
        public static extern int API_发送可超时消息(IntPtr hwnd,int msg,int wParam,int lParam,int fuFlags,int uTimeout,ref int lpdwResult);

        [DllImport("user32.dll", EntryPoint = "GetClassName")]
        public static extern int API_取窗口类名(IntPtr hwnd,StringBuilder lpClassName,int nMaxCount);

        [DllImport("user32.dll", EntryPoint = "GetWindowRect")]
        public static extern int API_取窗口矩形(IntPtr hwnd,ref Rectangle lpRect);

        #endregion

        #region 私有变量
        private bool m_bln捕获鼠标 = false;
        #endregion

        #region 函数
        private void fun取网页元素()
        {
            Rectangle o_rect = new Rectangle();
            Point o_pot当前鼠标坐标 = Cursor.Position;
            Point o_pot坐标 = new Point();

            IntPtr o_inthwnd = fun取光标处句柄();
            if (fun取窗口类名(o_inthwnd).Equals("Internet Explorer_Server"))
            {
                foreach (Control o_ctrl in groupBox2.Controls)
                {
                    if (o_ctrl.GetType() == typeof(System.Windows.Forms.TextBox))
                    {
                        ((TextBox)o_ctrl).Text = "";
                    }
                }
                API_取窗口矩形(o_inthwnd, ref o_rect);
                o_pot坐标.X = o_pot当前鼠标坐标.X - o_rect.Left;
                o_pot坐标.Y = o_pot当前鼠标坐标.Y - o_rect.Top;
                mshtml.IHTMLDocument2 o_doc对象 = (mshtml.IHTMLDocument2)fun取IES对象(o_inthwnd);
                IHTMLElement o_Element对象 = o_doc对象.elementFromPoint(o_pot坐标.X, o_pot坐标.Y);
                //以下其实自己喜欢取什么就取什么
                txt窗口句柄.Text = o_inthwnd.ToString();
                txt页面地址.Text = o_doc对象.url.ToString();
                txt元素.Text = o_Element对象.tagName;
                txtID.Text = o_Element对象.id;
                txt相关数据.Text = o_Element对象.innerText;
                txt引用代码.Text = o_Element对象.outerHTML;
            }
        }

        private object fun取IES对象(IntPtr intIES句柄)
        {
            Object domObject = new Object();
            int int资源编号 = 0;
            Guid guidIEDocument2 = new Guid(); //IHTMLDocument2的接口id
            int WM_Html_GETOBJECT = API_注册字符串消息("WM_Html_GETOBJECT");

            //开始查找指定的ie窗体
            API_发送可超时消息(intIES句柄, WM_Html_GETOBJECT, 0, 0, 2, 1000, ref int资源编号);
            int lreturn = API_取IEDocument(int资源编号, ref guidIEDocument2, 0, ref domObject);

            return domObject;

        }

        private IntPtr fun取光标处句柄()
        {
            return (API_取坐标窗口句柄(Cursor.Position));
        }

        private string fun取窗口类名(IntPtr Hwnd)
        {
            StringBuilder strClassName = new StringBuilder(256);
            API_取窗口类名(Hwnd, strClassName, strClassName.Capacity);
            return strClassName.ToString();
        }

        //多加的小玩意
        private Color fun随机颜色()
        {
            Random o_rnd = new Random(unchecked((int)DateTime.Now.Ticks));
            byte o_红 = (byte)o_rnd.Next(0, 255);
            System.Threading.Thread.Sleep(10);
            byte o_绿 = (byte)o_rnd.Next(0, 255);
            System.Threading.Thread.Sleep(10);
            byte o_蓝 = (byte)o_rnd.Next(0, 255);
            return Color.FromArgb(o_红, o_绿, o_蓝);
        }
        #endregion        

        #region 事件
        private void picMouse_MouseDown(object sender, MouseEventArgs e)
        {
            m_bln捕获鼠标 = true;
            picMouse.Image = null;
            picMouse.Cursor = new Cursor(Properties.Resources.鼠标_十字.GetHicon());
            API_置鼠标到捕获窗口(picMouse.Handle);

        }

        private void picMouse_MouseUp(object sender, MouseEventArgs e)
        {
            if (m_bln捕获鼠标)
            {
                API_释放鼠标();
                m_bln捕获鼠标 = false;
                picMouse.Cursor = Cursors.Hand;
                picMouse.Image = Properties.Resources.鼠标_十字;
            }
        }

        private void picMouse_MouseMove(object sender, MouseEventArgs e)
        {
            if (m_bln捕获鼠标)
            {
                fun取网页元素();
            }
        }

        private void timer1_Tick(object sender, EventArgs e)
        {
            label8.ForeColor = fun随机颜色();
        }

        #endregion        
        
    }
}