找到webbrowser中的控件句柄发送消息-转

Win32ApiWrapper类:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Runtime.InteropServices;

namespace projectfortab4
{
    public class Win32ApiWrapper
    {
        public const int WM_KEYDOWN = 0x100;
        public const int WM_KEYUP = 0x101;
        public const int VK_CONTROL = 0x11;
        public const int VK_F5 = 0x74;
        public const int KEYEVENTF_KEYUP = 0x2;
        public const int VK_MENU = 0x12;
        public const int WM_SETTEXT = 0xC;
        public const int WM_CLEAR = 0x303;
        public const int BN_CLICKED = 0;
        public const int WM_LBUTTONDOWN = 0x201;
        public const int WM_LBUTTONUP = 0x202;
        public const int WM_CLOSE = 0x10;
        public const int WM_COMMAND = 0x111;
        public const int WM_SYSKEYDOWN = 0x104;
        public const int GW_HWNDNEXT = 2;
        public const int WM_CLICK = 0x00F5;

        private static Dictionary<string, byte> keycode = new Dictionary<string, byte>(); 

        private delegate bool WNDENUMPROC(IntPtr hWnd, int lParam);

        static Win32ApiWrapper()
        {
            keycode.Add("A", 65);
            keycode.Add("B", 66);
            keycode.Add("C", 67);
            keycode.Add("D", 68);
            keycode.Add("E", 69);
            keycode.Add("F", 70);
            keycode.Add("G", 71);
            keycode.Add("H", 72);
            keycode.Add("I", 73);
            keycode.Add("J", 74);
            keycode.Add("K", 75);
            keycode.Add("L", 76);
            keycode.Add("M", 77);
            keycode.Add("N", 78);
            keycode.Add("O", 79);
            keycode.Add("P", 80);
            keycode.Add("Q", 81);
            keycode.Add("R", 82);
            keycode.Add("S", 83);
            keycode.Add("T", 84);
            keycode.Add("U", 85);
            keycode.Add("V", 86);
            keycode.Add("W", 87);
            keycode.Add("X", 88);
            keycode.Add("Y", 89);
            keycode.Add("Z", 90);
            keycode.Add("0", 48);
            keycode.Add("1", 49);
            keycode.Add("2", 50);
            keycode.Add("3", 51);
            keycode.Add("4", 52);
            keycode.Add("5", 53);
            keycode.Add("6", 54);
            keycode.Add("7", 55);
            keycode.Add("8", 56);
            keycode.Add("9", 57);
            keycode.Add(".", 0x6E);
            keycode.Add("LEFT", 0x25);
            keycode.Add("UP", 0x26);
            keycode.Add("RIGHT", 0x27);
            keycode.Add("DOWN", 0x28);
            keycode.Add("-", 0x6D); 
        }

        [DllImport("Gdi32.dll")]
        public extern static int BitBlt(IntPtr hDC, int x, int y, int nWidth, int nHeight, IntPtr hSrcDC, int xSrc, int ySrc, int dwRop);

        [DllImport("user32.dll")]
        public static extern IntPtr FindWindow(string lpClassName, string lpWindowName);

        [DllImport("user32.dll")]
        public extern static IntPtr GetWindow(IntPtr hWnd, int wCmd);

        [DllImport("user32.dll", EntryPoint = "SendMessage")]
        public static extern int SendMessage(IntPtr hWnd, int Msg, IntPtr wParam, string lParam);

        [DllImport("user32.dll ")]
        public static extern IntPtr FindWindowEx(IntPtr parent, IntPtr childe, string strclass, string FrmText);

        [DllImport("user32.DLL")]
        public static extern bool SetForegroundWindow(IntPtr hWnd);

        [DllImport("user32.dll", CharSet = CharSet.Auto)]
        internal static extern int GetWindowText(IntPtr hWnd, StringBuilder lpString, int nMaxCount);

        [DllImport("user32.dll")]
        private static extern int GetWindowTextW(IntPtr hWnd, [MarshalAs(UnmanagedType.LPWStr)]StringBuilder lpString, int nMaxCount);

        [DllImport("user32.dll")]
        private static extern bool EnumWindows(WNDENUMPROC lpEnumFunc, int lParam);

        [DllImport("user32.dll")]
        private static extern int GetClassNameW(IntPtr hWnd, [MarshalAs(UnmanagedType.LPWStr)]StringBuilder lpString, int nMaxCount);

        [DllImport("user32.dll")]
        private static extern bool EnumChildWindows(IntPtr hWndParent, WNDENUMPROC lpEnumFunc, int lParam);

        [DllImport("user32.dll", EntryPoint = "SendMessage")]
        public static extern int SendTxtMessage(int hWnd,
            // handle to destination window               
            int Msg, // message               
            int wParam, // first message parameter               
            char[] lParam             // int  lParam // second message parameter           
            );

        [DllImport("user32.dll", EntryPoint = "SendMessage")]
        public static extern int SendMessage(
            int hWnd, // handle to destination window               
            int Msg, // message               
            int wParam, // first message parameter                
            int lParam // second message parameter         
            );

        [DllImport("user32.dll")]
        public static extern void keybd_event(byte bVk, byte bScan, uint dwFlags, int dwExtraInfo);


        [DllImport("user32.dll", CharSet = CharSet.Auto)]
        static public extern bool SetWindowPos(IntPtr hWnd, IntPtr hWndInsertAfter, int x, int y, int Width, int Height, uint flags);

        [DllImport("user32.dll", EntryPoint = "SetWindowPos")]
        public static extern bool SetWindowPos(IntPtr hWnd, int HWND_TOPMOST, int x, int y, int Width, int Height, uint flags);


        [DllImport("user32.dll", CharSet = CharSet.Auto, EntryPoint = "PostMessage")]
        public static extern IntPtr PostMessage(IntPtr hwndParent, int hwndChildAfter, IntPtr wParam, string lpszWindow);

        

        /// <summary>
        /// 获取桌面所有的窗口
        /// </summary>
        /// <returns></returns>
        public static WindowInfo[] GetAllDesktopWindows()
        {
            List<WindowInfo> wndList = new List<WindowInfo>();
            EnumWindows(delegate(IntPtr hWnd, int lParam)
            {
                WindowInfo wnd = new WindowInfo();
                StringBuilder sb = new StringBuilder(256);
                wnd.hWnd = hWnd;
                GetWindowTextW(hWnd, sb, sb.Capacity);
                wnd.SzWindowName = sb.ToString();
                GetClassNameW(hWnd, sb, sb.Capacity);
                wnd.SzClassName = sb.ToString();
                wndList.Add(wnd);
                return true;
            }, 0);

            return wndList.ToArray();
        }


        public static List<WindowInfo> GetWindowByParentHwndAndClassName(IntPtr parentHwnd, string className)
        {
            List<WindowInfo> wndList = new List<WindowInfo>();
            EnumChildWindows(parentHwnd, delegate(IntPtr hWnd, int lParam)
            {
                WindowInfo wnd = new WindowInfo();
                StringBuilder sb = new StringBuilder(256);
                wnd.hWnd = hWnd;
                GetWindowTextW(hWnd, sb, sb.Capacity);
                wnd.SzWindowName = sb.ToString();
                GetClassNameW(hWnd, sb, sb.Capacity);
                wnd.SzClassName = sb.ToString();
                wndList.Add(wnd);
                return true;
            }, 0);
            return wndList.Where(o => o.SzClassName == className).ToList();
        }


        
        public static List<WindowInfo> GetChildWindowsByParentHwnd(IntPtr parentHwnd)
        {
            List<WindowInfo> childWndList = new List<WindowInfo>();
            EnumChildWindows(parentHwnd, delegate(IntPtr hWnd, int lParam)
            {
                WindowInfo wnd = new WindowInfo();
                StringBuilder sb = new StringBuilder(256);
                wnd.hWnd = hWnd;
                GetWindowTextW(hWnd, sb, sb.Capacity);
                wnd.SzWindowName = sb.ToString();
                GetClassNameW(hWnd, sb, sb.Capacity);
                wnd.SzClassName = sb.ToString();
                childWndList.Add(wnd);
                return true;
            }, 0);

            return childWndList;
        }
        


    }

   

    public class WindowInfo
    {
        public IntPtr hWnd { get; set; }

        public string SzWindowName { get; set; }

        public string SzClassName { get; set; }
    }
}

WinAPI 类：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Drawing;
using System.Runtime.InteropServices;

namespace projectfortab4
{
    class WinAPI
    {
        #region WinodwsAPI
        [DllImport("user32.dll", EntryPoint = "FindWindow")]
        private static extern IntPtr FindWindow(string IpClassName, string IpWindowName);

        [DllImport("user32.dll", EntryPoint = "FindWindowEx")]
        private static extern IntPtr FindWindowEx(IntPtr hwndParent, IntPtr hwndChildAfter, string lpszClass, string lpszWindow);

        [DllImport("user32.dll", EntryPoint = "SendMessage")]
        private static extern int SendMessage(IntPtr hWnd, int Msg, IntPtr wParam, string lParam);

        [DllImport("User32.DLL")]
        public static extern int SendMessage(IntPtr hWnd, uint Msg, int wParam, int lParam);
        public static int IDM_VIEWSOURCE = 2139;
        public static uint WM_COMMAND = 0x0111;

        [DllImport("user32.dll", EntryPoint = "GetParent")]
        public static extern IntPtr GetParent(IntPtr hWnd);

        [DllImport("user32.dll", EntryPoint = "GetCursorPos")]
        public static extern bool GetCursorPos(out Point pt);

        [DllImport("user32.dll", EntryPoint = "WindowFromPoint", CharSet = CharSet.Auto, ExactSpelling = true)]
        public static extern IntPtr WindowFromPoint(Point pt);

        [DllImport("user32.dll", CharSet = CharSet.Auto)]
        public static extern int GetClassName(IntPtr hWnd, StringBuilder lpClassName, int nMaxCount);

        [DllImport("user32.dll", CharSet = CharSet.Auto)]
        public static extern int GetWindowText(IntPtr hWnd, [Out, MarshalAs(UnmanagedType.LPTStr)] StringBuilder lpString, int nMaxCount);

        [DllImport("user32.dll", CharSet = CharSet.Auto)]
        public static extern int GetWindowRect(IntPtr hwnd, ref Rectangle rc);

        [DllImport("user32.dll", CharSet = CharSet.Auto)]
        public static extern int GetClientRect(IntPtr hwnd, ref Rectangle rc);

        [DllImport("user32.dll", CharSet = CharSet.Auto)]
        public static extern int MoveWindow(IntPtr hwnd, int x, int y, int nWidth, int nHeight, bool bRepaint);

        [DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true, ExactSpelling = true)]
        public static extern int ScreenToClient(IntPtr hWnd, ref Rectangle rect);
        #endregion

        #region 封装API方法
        /// <summary>
        /// 找到句柄
        /// </summary>
        /// <param name="IpClassName">类名</param>
        /// <returns></returns>
        public static IntPtr GetHandle(string IpClassName)
        {
            return FindWindow(IpClassName, null);
        }       

        /// <summary>
        /// 找到句柄
        /// </summary>
        /// <param name="p">坐标</param>
        /// <returns></returns>
        public static IntPtr GetHandle(Point p)
        {
            return WindowFromPoint(p);
        }

        //鼠标位置的坐标
        public static Point GetCursorPosPoint()
        {
            Point p = new Point();
            if (GetCursorPos(out p))
            {
                return p;
            }
            return default(Point);
        }

        /// <summary>
        /// 子窗口句柄
        /// </summary>
        /// <param name="hwndParent">父窗口句柄</param>
        /// <param name="hwndChildAfter">前一个同目录级同名窗口句柄</param>
        /// <param name="lpszClass">类名</param>
        /// <returns></returns>
        public static IntPtr GetChildHandle(IntPtr hwndParent, IntPtr hwndChildAfter, string lpszClass)
        {
            return FindWindowEx(hwndParent, hwndChildAfter, lpszClass, null);
        }

        /// <summary>
        /// 全部子窗口句柄
        /// </summary>
        /// <param name="hwndParent">父窗口句柄</param>
        /// <param name="className">类名</param>
        /// <returns></returns>
        public static List<IntPtr> GetChildHandles(IntPtr hwndParent, string className)
        {
            List<IntPtr> resultList = new List<IntPtr>();
            for (IntPtr hwndClient = GetChildHandle(hwndParent, IntPtr.Zero, className); hwndClient != IntPtr.Zero; hwndClient = GetChildHandle(hwndParent, hwndClient, className))
            {
                resultList.Add(hwndClient);
            }

            return resultList;
        }

        /// <summary>
        /// 给窗口发送内容
        /// </summary>
        /// <param name="hWnd">句柄</param>
        /// <param name="lParam">要发送的内容</param>
        public static void SetText(IntPtr hWnd, string lParam)
        {
            SendMessage(hWnd, WM_SETTEXT, IntPtr.Zero, lParam);
        }
        private const int WM_SETTEXT = 0x000C;

        /// <summary>
        /// 获得窗口内容或标题
        /// </summary>
        /// <param name="hWnd">句柄</param>
        /// <returns></returns>
        public static string GetText(IntPtr hWnd)
        {
            StringBuilder result = new StringBuilder(128);
            GetWindowText(hWnd, result, result.Capacity);
            return result.ToString();
        }

        /// <summary>
        /// 找类名
        /// </summary>
        /// <param name="hWnd">句柄</param>
        /// <returns></returns>
        public static string GetClassName(IntPtr hWnd)
        {
            StringBuilder lpClassName = new StringBuilder(128);
            if (GetClassName(hWnd, lpClassName, lpClassName.Capacity) == 0)
            {
                throw new Exception("not found IntPtr!");
            }
            return lpClassName.ToString();
        }

        /// <summary>
        /// 窗口在屏幕位置
        /// </summary>
        /// <param name="hWnd">句柄</param>
        /// <returns></returns>
        public static Rectangle GetWindowRect(IntPtr hWnd)
        {
            Rectangle result = default(Rectangle);
            GetWindowRect(hWnd, ref result);
            return result;
        }

        /// <summary>
        /// 窗口相对屏幕位置转换成父窗口位置
        /// </summary>
        /// <param name="hWnd"></param>
        /// <param name="rect"></param>
        /// <returns></returns>
        public static Rectangle ScreenToClient(IntPtr hWnd, Rectangle rect)
        {
            Rectangle result = rect;
            ScreenToClient(hWnd, ref result);
            return result;
        }

        /// <summary>
        /// 窗口大小
        /// </summary>
        /// <param name="hWnd"></param>
        /// <returns></returns>
        public static Rectangle GetClientRect(IntPtr hWnd)
        {
            Rectangle result = default(Rectangle);
            GetClientRect(hWnd, ref result);
            return result;
        }

        public static void GetInfo(IntPtr vHandle)
        {
            SendMessage(vHandle, WM_COMMAND, IDM_VIEWSOURCE, (int)vHandle);
           
        }

        #endregion

    }
}

button 点击事件：

private void button1_Click(object sender, EventArgs e)
        {
            var termname = this.Text;
            var win = Win32ApiWrapper.GetAllDesktopWindows().Where(o => o.SzWindowName == termname).FirstOrDefault();
            if (win != null)
            {
                IntPtr vHandles = webBrowser1.Handle;
                vHandles = WinAPI.GetChildHandle(vHandles, IntPtr.Zero, "Shell Embedding");
                vHandles = WinAPI.GetChildHandle(vHandles, IntPtr.Zero, "Shell DocObject View");
                vHandles = WinAPI.GetChildHandle(vHandles, IntPtr.Zero, "Internet Explorer_Server");
                //这里输出在webBrowser1中获取的html源码
                WinAPI.GetInfo(vHandles);

                var passwordCtrl = Win32ApiWrapper.GetChildWindowsByParentHwnd(win.hWnd).Where(o => o.SzClassName == "Edit").FirstOrDefault();
                if (passwordCtrl != null)
                {

                    //获得焦点
                    IntPtr hwnd_top = IntPtr.Zero;
                    uint swp_NoMovie = 2;
                    uint swp_NOSIZE = 1;
                    uint swp_NOACTIVATE = 0x10;
                    uint swp_SHOWWINDOW = 0x40;
                    Win32ApiWrapper.SetWindowPos(passwordCtrl.hWnd, hwnd_top, 0, 0, 0, 0, swp_NoMovie | swp_NOSIZE | swp_NOACTIVATE | swp_SHOWWINDOW);
                    Win32ApiWrapper.PostMessage(passwordCtrl.hWnd, Win32ApiWrapper.WM_LBUTTONDOWN, IntPtr.Zero, "");
                    Win32ApiWrapper.PostMessage(passwordCtrl.hWnd, Win32ApiWrapper.WM_LBUTTONUP, IntPtr.Zero, "");


                    
                    //写东西进去
                    //1种方法：
                    SendKeys.Send("{TAB}");
                    //2种方法
                    //EsaiSuperKeys.InputHelper.WinRingInput("As");
                    //3种方法
                    WinAPI.SetText(passwordCtrl.hWnd, "aaa");
                    //WinAPI.SetText(passwordCtrl.hWnd, "assdaa");
                }
            }
        }