给网页赋值参考信息

本文介绍如何使用C#开发Maxthon浏览器的按钮插件,包括配置文件详解及通过插件修改网页内容的方法。展示了如何从命令行参数获取网址等信息,并通过Internet Explorer_Server句柄获取IHTMLDocument2和IHTMLWindow2接口。

想用C#做一个Maxthon按钮插件,Maxthon按钮插件的配置文件plugin.ini如下。 

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[General]
Name=ConsoleApp

Author=阿良

Version=1.0

ModuleType=EXE

FileName=ConsoleApp.exe

Comments=Exe type Button

Type=M2Plugin_BUTTON

Icon=Icon.ico
当在Maxthon点击按钮时会执行ConsoleApp.exe,Maxthon会附加当前页面的参数。 
命令行格式如下 
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ConsoleApp.exe -h=Maxthon的句柄 -u=当前页面URL -wie=当前页面Internet Explorer_Server的句柄

下面就是通过Internet Explorer_Server句柄获得IHTMLDocument2和IHTMLWindow2的接口。获得接口后就可以对HTML页面进行更改了。 

以下是控制台项目的三个主要文件。可以在附件栏中下载。注意要添加三个引用:Accessibility,Microsoft.mshtml,SHDocVw.dll.这三个引用属性【复制本地】要设为true,做Maxthon插件时要将bin目录下生成的所有dll和ConsoleApp.exe一起复制才有作用。 

Program.cs 
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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;
using System.Runtime.InteropServices;
using System.Windows.Forms;
using SHDocVw;
using mshtml;

namespace ConsoleApp
{
    class Program
    {
        static void Main(string[] args)
        {
            string commandLine = Environment.CommandLine;

            string url = GetUrlFromCommandLine(commandLine);
            int maxthonHandle = GetMaxthonHandleFromCommandLine(commandLine);
            int explorerHandle = GetExplorerHandleFromCommandLine(commandLine);

            string message = "URL=" + url + Environment.NewLine
                 + "MaxthonHandle=" + maxthonHandle + Environment.NewLine
                 + "ExplorerHandle=" + explorerHandle + Environment.NewLine;


            IntPtr ptr = (IntPtr)explorerHandle;
            IHTMLDocument2 doc;
            IHTMLWindow2 win;
            GetInterfacesByHandleOfInternetExplorer_Server(ptr, out win, out doc);

            if (doc == null || win == null)
            {
                message += "GetInterfacesByHandleOfInternetExplorer_Server失败" + Environment.NewLine;
                MessageBox.Show(message);
            }
            else
            {
                message += "url from IHTMLDocument2=" + doc.url + Environment.NewLine;
                message += "url from IHTMLWindow2=" + win.location.href + Environment.NewLine;
                MessageBox.Show(message);

                win.execScript(@"
var changeColor = confirm('真的要改背景颜色为绿色吗?'); 
if (changeColor) 
    document.body.style.backgroundColor='green';",
                    "javascript");
            }
           

        }
     

        static void GetInterfacesByHandleOfInternetExplorer_Server(IntPtr hwndInterneExplorer_Server,
            out IHTMLWindow2 window, out IHTMLDocument2 document)
        {
            window = null;
            document = null;

            Guid IID_IWebBrowser2 = typeof(SHDocVw.IWebBrowser2).GUID;

            Guid IID_IServiceProvider = typeof(IServiceProvider).GUID;
            Guid IID_IHTMLDocument2 = typeof(IHTMLDocument2).GUID;

            Guid IID_IHTMLWindow2 = typeof(IHTMLWindow2).GUID;

            Guid SID_SWebBrowserApp = typeof(SHDocVw.IWebBrowserApp).GUID;

            try
            {
                int nMsg = WinApi.RegisterWindowMessage("WM_HTML_GETOBJECT");

                UIntPtr lRes;
                WinApi.SendMessageTimeout(hwndInterneExplorer_Server, nMsg, 0, 0,
                    WinApi.SMTO_ABORTIFHUNG, 1000, out lRes);

                if (!(bool)(lRes.ToUInt32() == 0))
                {
                    int hr = WinApi.ObjectFromLresult((int)lRes.ToUInt32(),
                        ref IID_IHTMLDocument2, 0, out document);

                    if ((document != null))
                    {
                        IntPtr puk = Marshal.GetIUnknownForObject(document);

                        IServiceProvider pro = document as IServiceProvider;
                        //Console.Write((pro == null).ToString());


                        object objIWebBrowser2;
                        pro.QueryService(ref SID_SWebBrowserApp, ref IID_IWebBrowser2, out objIWebBrowser2);
                        IWebBrowser2 web = objIWebBrowser2 as IWebBrowser2;

                        object objHtmlWindow;
                        pro.QueryService(ref IID_IHTMLWindow2, ref IID_IHTMLWindow2, out objHtmlWindow);
                        window = objHtmlWindow as IHTMLWindow2;
                    }
                }
            }
            catch
            {
            }
        }
        #region

        static string GetUrlFromCommandLine(string commandLine)
        {
            Regex regex = new Regex(@" -u=(?<Url>.+?) -wie");
            Match match = regex.Match(commandLine);
            if (match.Success)
            {
                return match.Groups["Url"].Value;
            }
            else
            {
                return string.Empty;
            }
        }
        static int GetMaxthonHandleFromCommandLine(string commandLine)
        {
            Regex regex = new Regex(@" -h=(?<Handle>/d+)");
            Match match = regex.Match(commandLine);
            if (match.Success)
            {
                return int.Parse(match.Groups["Handle"].Value);
            }
            else
            {
                return 0;
            }
        }
        static int GetExplorerHandleFromCommandLine(string commandLine)
        {
            Regex regex = new Regex(@" -wie=(?<Handle>/d+)");
            Match match = regex.Match(commandLine);
            if (match.Success)
            {
                return int.Parse(match.Groups["Handle"].Value);
            }
            else
            {
                return 0;
            }
        }
        #endregion

    }
}

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

namespace ConsoleApp
{
    [
    ComImport, Guid("6d5140c1-7436-11ce-8034-00aa006009fa"),
    InterfaceType(ComInterfaceType.InterfaceIsIUnknown)
    ]
    public interface IServiceProvider
    {
        void QueryService(ref Guid guidService,
            ref Guid riid,
            [MarshalAs(UnmanagedType.Interface)] out object ppvObject);
    }
}

WinApi.cs,在google code搜索的,我也不知道怎样定义的 
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using System;
using System.Text;
using System.Windows.Forms;
using System.Drawing;
using System.Runtime.InteropServices;
using Accessibility;
using mshtml;

namespace ConsoleApp
{
    public sealed class WinApi
    {
        //Not allow to create instance


        private WinApi()
        {

        }


        public const uint MAX_PATH = 260;

        #region Hooks - user32.dll


        /// <summary>

        /// Defines the layout of the MouseHookStruct

        /// </summary>

        [StructLayout(LayoutKind.Sequential)]
        public struct MSLLHOOKSTRUCT
        {
            public Point Point;
            public int MouseData;
            public int Flags;
            public int Time;
            public int ExtraInfo;
        }

        [StructLayout(LayoutKind.Sequential)]
        public struct POINT
        {
            public int x;
            public int y;
        }


        [StructLayout(LayoutKind.Sequential)]
        public struct MouseHookStruct
        {
            /// <summary>

            /// Specifies a POINT structure that contains the x- and y-coordinates of the cursor, in screen coordinates.

            /// </summary>

            public POINT Point;

            public UInt32 MouseData;
            public UInt32 Flags;
            public UInt32 Time;
            public UInt32 ExtraInfo;
        }

        /// <summary>

        /// &frac14;ü&Aring;&Igrave;&sup1;&sup3;×&Oacute;&Ecirc;&Acirc;&frac14;&thorn;&frac12;á&sup1;&sup1;&para;¨&Ograve;&aring;

        /// </summary>

        /// <remarks>&Iuml;ê&Iuml;&cedil;&Euml;&micro;&Atilde;÷&Ccedil;&euml;&sup2;&Icirc;&iquest;&frac14;MSDN&Ouml;&ETH;&sup1;&Oslash;&Oacute;&Uacute; KBDLLHOOKSTRUCT &micro;&Auml;&Euml;&micro;&Atilde;÷</remarks>

        [StructLayout(LayoutKind.Sequential)]
        public struct KeyboardHookStruct
        {
            /// <summary>

            /// Specifies a virtual-key code. The code must be a value in the range 1 to 254.

            /// </summary>

            public UInt32 VKCode;

            /// <summary>

            /// Specifies a hardware scan code for the key.

            /// </summary>

            public UInt32 ScanCode;

            /// <summary>

            /// Specifies the extended-key flag, event-injected flag, context code,

            /// and transition-state flag. This member is specified as follows.

            /// An application can use the following values to test the keystroke flags.

            /// </summary>

            public UInt32 Flags;

            /// <summary>

            /// Specifies the time stamp for this message.

            /// </summary>

            public UInt32 Time;

            /// <summary>

            /// Specifies extra information associated with the message.

            /// </summary>

            public UInt32 ExtraInfo;
        }

        /// <summary>

        ///  EventArgs class for use as parameters by HookEventHandler delegates

        /// </summary>

        public class HookEventArgs : EventArgs
        {
            private int _code;
            private IntPtr _wParam;
            private IntPtr _lParam;

            /// <summary>

            /// Initializes a new instance of the HookEventArgs class

            /// </summary>

            /// <param name="code">the hook code</param>

            /// <param name="wParam">hook specific information</param>

            /// <param name="lParam">hook specific information</param>

            public HookEventArgs(int code, IntPtr wParam, IntPtr lParam)
            {
                _code = code;
                _wParam = wParam;
                _lParam = lParam;
            }

            /// <summary>

            /// The hook code

            /// </summary>

            public int Code
            {
                get
                {
                    return _code;
                }
            }

            /// <summary>

            /// A pointer to data

            /// </summary>

            public IntPtr wParam
            {
                get
                {
                    return _wParam;
                }
            }

            /// <summary>

            /// A pointer to data

            /// </summary>

            public IntPtr lParam
            {
                get
                {
                    return _lParam;
                }
            }
        }

        /// <summary>

        /// Event delegate for use with the HookEventArgs class

        /// </summary>

        public delegate void HookEventHandler(object sender, HookEventArgs e);

        /// <summary>

        /// Defines the various types of hooks that are available in Windows

        /// </summary>

        public enum HookTypes : int
        {
            WH_JOURNALRECORD = 0,
            WH_JOURNALPLAYBACK = 1,
            WH_KEYBOARD = 2,
            WH_GETMESSAGE = 3,
            WH_CALLWNDPROC = 4,
            WH_CBT = 5,
            WH_SYSMSGFILTER = 6,
            WH_MOUSE = 7,
            WH_HARDWARE = 8,
            WH_DEBUG = 9,
            WH_SHELL = 10,
            WH_FOREGROUNDIDLE = 11,
            WH_CALLWNDPROCRET = 12,
            WH_KEYBOARD_LL = 13,
            WH_MOUSE_LL = 14
        }

        public enum ShellHookMessages
        {
            HSHELL_WINDOWCREATED = 1,
            HSHELL_WINDOWDESTROYED = 2,
            HSHELL_ACTIVATESHELLWINDOW = 3,
            HSHELL_WINDOWACTIVATED = 4,
            HSHELL_GETMINRECT = 5,
            HSHELL_REDRAW = 6,
            HSHELL_TASKMAN = 7,
            HSHELL_LANGUAGE = 8,
            HSHELL_ACCESSIBILITYSTATE = 11
        }
        public enum WM_MOUSE : int
        {
            /// <summary>

            /// &Ecirc;ó±ê&iquest;&ordf;&Ecirc;&frac14;

            /// </summary>

            WM_MOUSEFIRST = 0x200,

            /// <summary>

            /// &Ecirc;ó±ê&Ograve;&AElig;&para;&macr;

            /// </summary>

            WM_MOUSEMOVE = 0x200,

            /// <summary>

            /// ×ó&frac14;ü°&acute;&Iuml;&Acirc;

            /// </summary>

            WM_LBUTTONDOWN = 0x201,

            /// <summary>

            /// ×ó&frac14;ü&Ecirc;&Iacute;·&Aring;

            /// </summary>

            WM_LBUTTONUP = 0x202,

            /// <summary>

            /// ×ó&frac14;ü&Euml;&laquo;&raquo;÷

            /// </summary>

            WM_LBUTTONDBLCLK = 0x203,

            /// <summary>

            /// &Oacute;&Ograve;&frac14;ü°&acute;&Iuml;&Acirc;

            /// </summary>

            WM_RBUTTONDOWN = 0x204,

            /// <summary>

            /// &Oacute;&Ograve;&frac14;ü&Ecirc;&Iacute;·&Aring;

            /// </summary>

            WM_RBUTTONUP = 0x205,

            /// <summary>

            /// &Oacute;&Ograve;&frac14;ü&Euml;&laquo;&raquo;÷

            /// </summary>

            WM_RBUTTONDBLCLK = 0x206,

            /// <summary>

            /// &Ouml;&ETH;&frac14;ü°&acute;&Iuml;&Acirc;

            /// </summary>

            WM_MBUTTONDOWN = 0x207,

            /// <summary>

            /// &Ouml;&ETH;&frac14;ü&Ecirc;&Iacute;·&Aring;

            /// </summary>

            WM_MBUTTONUP = 0x208,

            /// <summary>

            /// &Ouml;&ETH;&frac14;ü&Euml;&laquo;&raquo;÷

            /// </summary>

            WM_MBUTTONDBLCLK = 0x209,

            /// <summary>

            /// &sup1;&ouml;&Acirc;&Ouml;&sup1;&ouml;&para;&macr;

            /// </summary>

            /// <remarks>WINNT4.0&Ograve;&Ocirc;&Eacute;&Iuml;&sup2;&Aring;&Ouml;§&sup3;&Ouml;&acute;&Euml;&Iuml;&ucirc;&Iuml;&cent;</remarks>

            WM_MOUSEWHEEL = 0x020A
        }

        //message for list box

        public enum LISTBOXMSG : int
        {
            LB_ADDSTRING = 0x0180,
            LB_INSERTSTRING = 0x0181,
            LB_DELETESTRING = 0x0182,
            LB_SELITEMRANGEEX = 0x0183,
            LB_RESETCONTENT = 0x0184,
            LB_SETSEL = 0x0185,
            LB_SETCURSEL = 0x0186,
            LB_GETSEL = 0x0187,
            LB_GETCURSEL = 0x0188,
            LB_GETTEXT = 0x0189,
            LB_GETTEXTLEN = 0x018A,
            LB_GETCOUNT = 0x018B,
            LB_SELECTSTRING = 0x018C,
            LB_DIR = 0x018D,
            LB_GETTOPINDEX = 0x018E,
            LB_FINDSTRING = 0x018F,
            LB_GETSELCOUNT = 0x0190,
            LB_GETSELITEMS = 0x0191,
            LB_SETTABSTOPS = 0x0192,
            LB_GETHORIZONTALEXTENT = 0x0193,
            LB_SETHORIZONTALEXTENT = 0x0194,
            LB_SETCOLUMNWIDTH = 0x0195,
            LB_ADDFILE = 0x0196,
            LB_SETTOPINDEX = 0x0197,
            LB_GETITEMRECT = 0x0198,
            LB_GETITEMDATA = 0x0199,
            LB_SETITEMDATA = 0x019A,
            LB_SELITEMRANGE = 0x019B,
            LB_SETANCHORINDEX = 0x019C,
            LB_GETANCHORINDEX = 0x019D,
            LB_SETCARETINDEX = 0x019E,
            LB_GETCARETINDEX = 0x019F,
            LB_SETITEMHEIGHT = 0x01A0,
            LB_GETITEMHEIGHT = 0x01A1,
            LB_FINDSTRINGEXACT = 0x01A2,
            LB_SETLOCALE = 0x01A5,
            LB_GETLOCALE = 0x01A6,
            LB_SETCOUNT = 0x01A7,
        }


        //message for combo box.

        public enum COMBOBOXMSG : int
        {
            CB_OKAY = 0,
            CB_ERR = (-1),
            CB_ERRSPACE = (-2),
            CBN_ERRSPACE = (-1),
            CBN_SELCHANGE = 1,
            CBN_DBLCLK = 2,
            CBN_SETFOCUS = 3,
            CBN_KILLFOCUS = 4,
            CBN_EDITCHANGE = 5,
            CBN_EDITUPDATE = 6,
            CBN_DROPDOWN = 7,
            CBN_CLOSEUP = 8,
            CBN_SELENDOK = 9,
            CBN_SELENDCANCEL = 10,
            CBS_SIMPLE = 0x0001,
            CBS_DROPDOWN = 0x0002,
            CBS_DROPDOWNLIST = 0x0003,
            CBS_OWNERDRAWFIXED = 0x0010,
            CBS_OWNERDRAWVARIABLE = 0x0020,
            CBS_AUTOHSCROLL = 0x0040,
            CBS_OEMCONVERT = 0x0080,
            CBS_SORT = 0x0100,
            CBS_HASSTRINGS = 0x0200,
            CBS_NOINTEGRALHEIGHT = 0x0400,
            CBS_DISABLENOSCROLL = 0x0800,
            CBS_UPPERCASE = 0x2000,
            CBS_LOWERCASE = 0x4000,
            CB_GETEDITSEL = 0x0140,
            CB_LIMITTEXT = 0x0141,
            CB_SETEDITSEL = 0x0142,
            CB_ADDSTRING = 0x0143,
            CB_DELETESTRING = 0x0144,
            CB_DIR = 0x0145,
            CB_GETCOUNT = 0x0146,
            CB_GETCURSEL = 0x0147,
            CB_GETLBTEXT = 0x0148,
            CB_GETLBTEXTLEN = 0x0149,
            CB_INSERTSTRING = 0x014A,
            CB_RESETCONTENT = 0x014B,
            CB_FINDSTRING = 0x014C,
            CB_SELECTSTRING = 0x014D,
            CB_SETCURSEL = 0x014E,
            CB_SHOWDROPDOWN = 0x014F,
            CB_GETITEMDATA = 0x0150,
            CB_SETITEMDATA = 0x0151,
            CB_GETDROPPEDCONTROLRECT = 0x0152,
            CB_SETITEMHEIGHT = 0x0153,
            CB_GETITEMHEIGHT = 0x0154,
            CB_SETEXTENDEDUI = 0x0155,
            CB_GETEXTENDEDUI = 0x0156,
            CB_GETDROPPEDSTATE = 0x0157,
            CB_FINDSTRINGEXACT = 0x0158,
            CB_SETLOCALE = 0x0159,
            CB_GETLOCALE = 0x015A,
            CB_GETTOPINDEX = 0x015b,
            CB_SETTOPINDEX = 0x015c,
            CB_GETHORIZONTALEXTENT = 0x015d,
            CB_SETHORIZONTALEXTENT = 0x015e,
            CB_GETDROPPEDWIDTH = 0x015f,
            CB_SETDROPPEDWIDTH = 0x0160,
            CB_INITSTORAGE = 0x0161,
            CB_MSGMAX = 0x0162,
        }

        //virtual keys

        public enum VKCodes : int
        {
            VK_BACK = 0x08,
            VK_TAB = 0x09,

            VK_CLEAR = 0x0C,
            VK_RETURN = 0x0D,

            VK_SHIFT = 0x10,
            VK_CONTROL = 0x11,
            VK_MENU = 0x12,
            VK_PAUSE = 0x13,
            VK_CAPITAL = 0x14,

            VK_KANA = 0x15,
            VK_HANGEUL = 0x15,
            VK_HANGUL = 0x15,
            VK_JUNJA = 0x17,
            VK_FINAL = 0x18,
            VK_HANJA = 0x19,
            VK_KANJI = 0x19,

            VK_ESCAPE = 0x1B,

            VK_CONVERT = 0x1C,
            VK_NONCONVERT = 0x1D,
            VK_ACCEPT = 0x1E,
            VK_MODECHANGE = 0x1F,

            VK_SPACE = 0x20,
            VK_PRIOR = 0x21,
            VK_NEXT = 0x22,
            VK_END = 0x23,
            VK_HOME = 0x24,
            VK_LEFT = 0x25,
            VK_UP = 0x26,
            VK_RIGHT = 0x27,
            VK_DOWN = 0x28,
            VK_SELECT = 0x29,
            VK_PRINT = 0x2A,
            VK_EXECUTE = 0x2B,
            VK_SNAPSHOT = 0x2C,
            VK_INSERT = 0x2D,
            VK_DELETE = 0x2E,
            VK_HELP = 0x2F,


            VK_LWIN = 0x5B,
            VK_RWIN = 0x5C,
            VK_APPS = 0x5D,


            VK_SLEEP = 0x5F,
            VK_NUMLOCK = 90,
            VK_NUMPAD0 = 0x60,
            VK_NUMPAD1 = 0x61,
            VK_NUMPAD2 = 0x62,
            VK_NUMPAD3 = 0x63,
            VK_NUMPAD4 = 0x64,
            VK_NUMPAD5 = 0x65,
            VK_NUMPAD6 = 0x66,
            VK_NUMPAD7 = 0x67,
            VK_NUMPAD8 = 0x68,
            VK_NUMPAD9 = 0x69,
            VK_MULTIPLY = 0x6A,
            VK_ADD = 0x6B,
            VK_SEPARATOR = 0x6C,
            VK_SUBTRACT = 0x6D,
            VK_DECIMAL = 0x6E,
            VK_DIVIDE = 0x6F,
            VK_F1 = 0x70,
            VK_F2 = 0x71,
            VK_F3 = 0x72,
            VK_F4 = 0x73,
            VK_F5 = 0x74,
            VK_F6 = 0x75,
            VK_F7 = 0x76,
            VK_F8 = 0x77,
            VK_F9 = 0x78,
            VK_F10 = 0x79,
            VK_F11 = 0x7A,
            VK_F12 = 0x7B,
            VK_F13 = 0x7C,
            VK_F14 = 0x7D,
            VK_F15 = 0x7E,
            VK_F16 = 0x7F,
            VK_F17 = 0x80,
            VK_F18 = 0x81,
            VK_F19 = 0x82,
            VK_F20 = 0x83,
            VK_F21 = 0x84,
            VK_F22 = 0x85,
            VK_F23 = 0x86,
            VK_F24 = 0x87
        }


        public enum WM_KEYBOARD : int
        {
            /// <summary>

            /// ·&Ccedil;&Iuml;&micro;&Iacute;&sup3;°&acute;&frac14;ü°&acute;&Iuml;&Acirc;

            /// </summary>

            WM_KEYDOWN = 0x100,

            /// <summary>

            /// ·&Ccedil;&Iuml;&micro;&Iacute;&sup3;°&acute;&frac14;ü&Ecirc;&Iacute;·&Aring;

            /// </summary>

            WM_KEYUP = 0x101,

            /// <summary>

            /// &Iuml;&micro;&Iacute;&sup3;°&acute;&frac14;ü°&acute;&Iuml;&Acirc;

            /// </summary>

            WM_SYSKEYDOWN = 0x104,

            /// <summary>

            /// &Iuml;&micro;&Iacute;&sup3;°&acute;&frac14;ü&Ecirc;&Iacute;·&Aring;

            /// </summary>

            WM_SYSKEYUP = 0x105
        }
        public delegate int HookProc(int nCode, Int32 wParam, IntPtr lParam);

        [DllImport("user32.dll", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall, SetLastError = true, EntryPoint = "SetWindowsHookEx")]
        public static extern IntPtr SetWindowsHookEx(HookTypes hookType, HookProc hookProc, IntPtr hInstance, int nThreadId);

        [DllImport("user32.dll")]
        public static extern int UnhookWindowsHookEx(IntPtr hookHandle);

        [DllImport("user32.dll")]
        public static extern int CallNextHookEx(IntPtr hookHandle, int nCode, Int32 wParam, IntPtr lParam);

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

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

        [DllImport("user32.dll")]
        public static extern int ToAscii(UInt32 uVirtKey, UInt32 uScanCode,
            byte[] lpbKeyState, byte[] lpwTransKey, UInt32 fuState);

        [DllImport("user32.dll")]
        public static extern int GetKeyboardState(byte[] pbKeyState);

        #endregion Hooks


        #region System - Kernel32.dll


        [DllImport("kernel32.dll", EntryPoint = "GetLastError", SetLastError = true, ExactSpelling = true, CallingConvention = CallingConvention.StdCall)]
        public static extern Int32 GetLastError();

        #endregion


        #region Windows - user32.dll


        public const int GWL_HWNDPARENT = (-8);
        public const int GWL_EXSTYLE = (-20);
        public const int GWL_STYLE = (-16);
        public const int GCL_HICON = (-14);
        public const int GCL_HICONSM = (-34);
        public const int WM_QUERYDRAGICON = 0x37;
        public const int WM_GETICON = 0x7F;
        public const int WM_SETICON = 0x80;
        public const int ICON_SMALL = 0;
        public const int ICON_BIG = 1;
        public const int SMTO_ABORTIFHUNG = 0x2;
        public const int TRUE = 1;
        public const int FALSE = 0;

        public const int WHITE_BRUSH = 0;
        public const int LTGRAY_BRUSH = 1;
        public const int GRAY_BRUSH = 2;
        public const int DKGRAY_BRUSH = 3;
        public const int BLACK_BRUSH = 4;
        public const int NULL_BRUSH = 5;
        public const int HOLLOW_BRUSH = NULL_BRUSH;
        public const int WHITE_PEN = 6;
        public const int BLACK_PEN = 7;
        public const int NULL_PEN = 8;
        public const int OEM_FIXED_FONT = 10;
        public const int ANSI_FIXED_FONT = 11;
        public const int ANSI_VAR_FONT = 12;
        public const int SYSTEM_FONT = 13;
        public const int DEVICE_DEFAULT_FONT = 14;
        public const int DEFAULT_PALETTE = 15;
        public const int SYSTEM_FIXED_FONT = 16;


        public const int RDW_INVALIDATE = 0x0001;
        public const int RDW_INTERNALPAINT = 0x0002;
        public const int RDW_ERASE = 0x0004;

        public const int RDW_VALIDATE = 0x0008;
        public const int RDW_NOINTERNALPAINT = 0x0010;
        public const int RDW_NOERASE = 0x0020;

        public const int RDW_NOCHILDREN = 0x0040;
        public const int RDW_ALLCHILDREN = 0x0080;

        public const int RDW_UPDATENOW = 0x0100;
        public const int RDW_ERASENOW = 0x0200;

        public const int RDW_FRAME = 0x0400;
        public const int RDW_NOFRAME = 0x0800;

        //enum to how to navigate in InternetExplorer.

        public enum BrowserNavConstants
        {
            /// <summary>

            /// Open the resource or file in a new window.

            /// </summary>

            navOpenInNewWindow = 0x1,
            /// <summary>

            /// Do not add the resource or file to the history list. The new page replaces the current page in the list.

            /// </summary>

            navNoHistory = 0x2,
            /// <summary>

            /// Do not consult the Internet cache; retrieve the resource from the origin server (implies BINDF_PRAGMA_NO_CACHE and BINDF_RESYNCHRONIZE).

            /// </summary>

            navNoReadFromCache = 0x4,
            /// <summary>

            /// Do not add the downloaded resource to the Internet cache. See BINDF_NOWRITECACHE.

            /// </summary>

            navNoWriteToCache = 0x8,
            /// <summary>

            /// If the navigation fails, the autosearch functionality attempts to navigate common root domains (.com, .edu, and so on). If this also fails, the URL is passed to a search engine.

            /// </summary>

            navAllowAutosearch = 0x10,
            /// <summary>

            /// Causes the current Explorer Bar to navigate to the given item, if possible.

            /// </summary>

            navBrowserBar = 0x20,
            /// <summary>

            /// Microsoft Internet Explorer 6 for Microsoft Windows XP Service Pack 2 (SP2) and later. If the navigation fails when a hyperlink is being followed, this constant specifies that the resource should then be bound to the moniker using the BINDF_HYPERLINK flag.

            /// </summary>

            navHyperlink = 0x40,
            /// <summary>

            /// Internet Explorer 6 for Windows XP SP2 and later. Force the URL into the restricted zone.

            /// </summary>

            navEnforceRestricted = 0x80,
            /// <summary>

            /// Internet Explorer 6 for Windows XP SP2 and later. Use the default Popup Manager to block pop-up windows.

            /// </summary>

            navNewWindowsManaged = 0x0100,
            /// <summary>

            /// Internet Explorer 6 for Windows XP SP2 and later. Block files that normally trigger a file download dialog box.

            /// </summary>

            navUntrustedForDownload = 0x0200,
            /// <summary>

            /// Internet Explorer 6 for Windows XP SP2 and later. Prompt for the installation of Microsoft ActiveX controls.

            /// </summary>

            navTrustedForActiveX = 0x0400,
            /// <summary>

            /// Windows Internet Explorer 7. Open the resource or file in a new tab. Allow the destination window to come to the foreground, if necessary.

            /// </summary>

            navOpenInNewTab = 0x0800,
            /// <summary>

            /// Internet Explorer 7. Open the resource or file in a new background tab; the currently active window and/or tab remains open on top.

            /// </summary>

            navOpenInBackgroundTab = 0x1000,
            /// <summary>

            /// Internet Explorer 7. Maintain state for dynamic navigation based on the filter string entered in the search band text box (wordwheel). Restore the wordwheel text when the navigation completes.

            /// </summary>

            navKeepWordWheelText = 0x2000
        }

        public enum ShowWindowCmds
        {
            SW_HIDE = 0,
            SW_SHOWNORMAL = 1,
            SW_NORMAL = 1,
            SW_SHOWMINIMIZED = 2,
            SW_SHOWMAXIMIZED = 3,
            SW_MAXIMIZE = 3,
            SW_SHOWNOACTIVATE = 4,
            SW_SHOW = 5,
            SW_MINIMIZE = 6,
            SW_SHOWMINNOACTIVE = 7,
            SW_SHOWNA = 8,
            SW_RESTORE = 9,
            SW_SHOWDEFAULT = 10,
            SW_FORCEMINIMIZE = 11,
            SW_MAX = 11
        }

        [StructLayout(LayoutKind.Sequential)]
        public struct MOUSEINPUT
        {
            public int dx;
            public int dy;
            public uint mouseData;
            public uint dwFlags;
            public uint time;
            public IntPtr dwExtraInfo;
        }

        [StructLayout(LayoutKind.Sequential)]
        public struct KEYBDINPUT
        {
            public ushort wVk;
            public ushort wScan;
            public uint dwFlags;
            public uint time;
            public IntPtr dwExtraInfo;
        }

        [StructLayout(LayoutKind.Sequential)]
        public struct HARDWAREINPUT
        {
            public uint uMsg;
            public ushort wParamL;
            public ushort wParamH;
        }


        [StructLayout(LayoutKind.Explicit)]
        public struct INPUT
        {
            [FieldOffset(0)]
            public int type;
            [FieldOffset(4)]
            public MOUSEINPUT mi;
            [FieldOffset(4)]
            public KEYBDINPUT ki;
            [FieldOffset(4)]
            public HARDWAREINPUT hi;
        }

        public const int HIDE_WINDOW = 0;
        public const int SHOW_OPENWINDOW = 1;
        public const int SHOW_ICONWINDOW = 2;
        public const int SHOW_FULLSCREEN = 3;
        public const int SHOW_OPENNOACTIVATE = 4;
        public const int SW_PARENTCLOSING = 1;
        public const int SW_OTHERZOOM = 2;
        public const int SW_PARENTOPENING = 3;
        public const int SW_OTHERUNZOOM = 4;

        public const int SWP_NOSIZE = 0x0001;
        public const int SWP_NOMOVE = 0x0002;
        public const int SWP_NOZORDER = 0x0004;
        public const int SWP_NOREDRAW = 0x0008;
        public const int SWP_NOACTIVATE = 0x0010;
        public const int SWP_FRAMECHANGED = 0x0020; /* The frame changed: send WM_NCCALCSIZE */
        public const int SWP_SHOWWINDOW = 0x0040;
        public const int SWP_HIDEWINDOW = 0x0080;
        public const int SWP_NOCOPYBITS = 0x0100;
        public const int SWP_NOOWNERZORDER = 0x0200; /* Don't do owner Z ordering */
        public const int SWP_NOSENDCHANGING = 0x0400;  /* Don't send WM_WINDOWPOSCHANGING */
        public const int SWP_DRAWFRAME = SWP_FRAMECHANGED;
        public const int SWP_NOREPOSITION = SWP_NOOWNERZORDER;
        public const int SWP_DEFERERASE = 0x2000;
        public const int SWP_ASYNCWINDOWPOS = 0x4000;

        public const int HWND_TOP = 0;
        public const int HWND_BOTTOM = 1;
        public const int HWND_TOPMOST = -1;
        public const int HWND_NOTOPMOST = -2;

        public enum PeekMessageFlags
        {
            PM_NOREMOVE = 0,
            PM_REMOVE = 1,
            PM_NOYIELD = 2
        }

        public enum MouseEventFlags
        {
            Move = 0x0001,
            LeftDown = 0x0002,
            LeftUp = 0x0004,
            RightDown = 0x0008,
            RightUp = 0x0010,
            MiddleDown = 0x0020,
            MiddleUp = 0x0040,
            Wheel = 0x0800,
            Absolute = 0x8000
        }

        public enum ScrollBarMsg
        {
            SB_LINEUP = 0,
            SB_LINELEFT = 0,
            SB_LINEDOWN = 1,
            SB_LINERIGHT = 1,
            SB_PAGEUP = 2,
            SB_PAGELEFT = 2,
            SB_PAGEDOWN = 3,
            SB_PAGERIGHT = 3,
            SB_THUMBPOSITION = 4,
            SB_THUMBTRACK = 5,
            SB_TOP = 6,
            SB_LEFT = 6,
            SB_BOTTOM = 7,
            SB_RIGHT = 7,
            SB_ENDSCROLL = 8,
            WM_PAINT = 0x000F
        }

        public enum WindowMessages : int
        {
            WM_NULL = 0x0000,
            WM_CREATE = 0x0001,
            WM_DESTROY = 0x0002,
            WM_MOVE = 0x0003,
            WM_SIZE = 0x0005,
            WM_ACTIVATE = 0x0006,
            WM_SETFOCUS = 0x0007,
            WM_KILLFOCUS = 0x0008,
            WM_ENABLE = 0x000A,
            WM_SETREDRAW = 0x000B,
            WM_SETTEXT = 0x000C,
            WM_GETTEXT = 0x000D,
            WM_GETTEXTLENGTH = 0x000E,
            WM_PAINT = 0x000F,
            WM_CLOSE = 0x0010,
            WM_QUERYENDSESSION = 0x0011,
            WM_QUIT = 0x0012,
            WM_QUERYOPEN = 0x0013,
            WM_ERASEBKGND = 0x0014,
            WM_SYSCOLORCHANGE = 0x0015,
            WM_ENDSESSION = 0x0016,
            WM_SHOWWINDOW = 0x0018,
            WM_CTLCOLOR = 0x0019,
            WM_WININICHANGE = 0x001A,
            WM_SETTINGCHANGE = 0x001A,
            WM_DEVMODECHANGE = 0x001B,
            WM_ACTIVATEAPP = 0x001C,
            WM_FONTCHANGE = 0x001D,
            WM_TIMECHANGE = 0x001E,
            WM_CANCELMODE = 0x001F,
            WM_SETCURSOR = 0x0020,
            WM_MOUSEACTIVATE = 0x0021,
            WM_CHILDACTIVATE = 0x0022,
            WM_QUEUESYNC = 0x0023,
            WM_GETMINMAXINFO = 0x0024,
            WM_PAINTICON = 0x0026,
            WM_ICONERASEBKGND = 0x0027,
            WM_NEXTDLGCTL = 0x0028,
            WM_SPOOLERSTATUS = 0x002A,
            WM_DRAWITEM = 0x002B,
            WM_MEASUREITEM = 0x002C,
            WM_DELETEITEM = 0x002D,
            WM_VKEYTOITEM = 0x002E,
            WM_CHARTOITEM = 0x002F,
            WM_SETFONT = 0x0030,
            WM_GETFONT = 0x0031,
            WM_SETHOTKEY = 0x0032,
            WM_GETHOTKEY = 0x0033,
            WM_QUERYDRAGICON = 0x0037,
            WM_COMPAREITEM = 0x0039,
            WM_GETOBJECT = 0x003D,
            WM_COMPACTING = 0x0041,
            WM_COMMNOTIFY = 0x0044,
            WM_WINDOWPOSCHANGING = 0x0046,
            WM_WINDOWPOSCHANGED = 0x0047,
            WM_POWER = 0x0048,
            WM_COPYDATA = 0x004A,
            WM_CANCELJOURNAL = 0x004B,
            WM_NOTIFY = 0x004E,
            WM_INPUTLANGCHANGEREQUEST = 0x0050,
            WM_INPUTLANGCHANGE = 0x0051,
            WM_TCARD = 0x0052,
            WM_HELP = 0x0053,
            WM_USERCHANGED = 0x0054,
            WM_NOTIFYFORMAT = 0x0055,
            WM_CONTEXTMENU = 0x007B,
            WM_STYLECHANGING = 0x007C,
            WM_STYLECHANGED = 0x007D,
            WM_DISPLAYCHANGE = 0x007E,
            WM_GETICON = 0x007F,
            WM_SETICON = 0x0080,
            WM_NCCREATE = 0x0081,
            WM_NCDESTROY = 0x0082,
            WM_NCCALCSIZE = 0x0083,
            WM_NCHITTEST = 0x0084,
            WM_NCPAINT = 0x0085,
            WM_NCACTIVATE = 0x0086,
            WM_GETDLGCODE = 0x0087,
            WM_SYNCPAINT = 0x0088,
            WM_NCMOUSEMOVE = 0x00A0,
            WM_NCLBUTTONDOWN = 0x00A1,
            WM_NCLBUTTONUP = 0x00A2,
            WM_NCLBUTTONDBLCLK = 0x00A3,
            WM_NCRBUTTONDOWN = 0x00A4,
            WM_NCRBUTTONUP = 0x00A5,
            WM_NCRBUTTONDBLCLK = 0x00A6,
            WM_NCMBUTTONDOWN = 0x00A7,
            WM_NCMBUTTONUP = 0x00A8,
            WM_NCMBUTTONDBLCLK = 0x00A9,
            WM_KEYDOWN = 0x0100,
            WM_KEYUP = 0x0101,
            WM_CHAR = 0x0102,
            WM_DEADCHAR = 0x0103,
            WM_SYSKEYDOWN = 0x0104,
            WM_SYSKEYUP = 0x0105,
            WM_SYSCHAR = 0x0106,
            WM_SYSDEADCHAR = 0x0107,
            WM_KEYLAST = 0x0108,
            WM_IME_STARTCOMPOSITION = 0x010D,
            WM_IME_ENDCOMPOSITION = 0x010E,
            WM_IME_COMPOSITION = 0x010F,
            WM_IME_KEYLAST = 0x010F,
            WM_INITDIALOG = 0x0110,
            WM_COMMAND = 0x0111,
            WM_SYSCOMMAND = 0x0112,
            WM_TIMER = 0x0113,
            WM_HSCROLL = 0x0114,
            WM_VSCROLL = 0x0115,
            WM_INITMENU = 0x0116,
            WM_INITMENUPOPUP = 0x0117,
            WM_MENUSELECT = 0x011F,
            WM_MENUCHAR = 0x0120,
            WM_ENTERIDLE = 0x0121,
            WM_MENURBUTTONUP = 0x0122,
            WM_MENUDRAG = 0x0123,
            WM_MENUGETOBJECT = 0x0124,
            WM_UNINITMENUPOPUP = 0x0125,
            WM_MENUCOMMAND = 0x0126,
            WM_CTLCOLORMSGBOX = 0x0132,
            WM_CTLCOLOREDIT = 0x0133,
            WM_CTLCOLORLISTBOX = 0x0134,
            WM_CTLCOLORBTN = 0x0135,
            WM_CTLCOLORDLG = 0x0136,
            WM_CTLCOLORSCROLLBAR = 0x0137,
            WM_CTLCOLORSTATIC = 0x0138,
            WM_MOUSEMOVE = 0x0200,
            WM_LBUTTONDOWN = 0x0201,
            WM_LBUTTONUP = 0x0202,
            WM_LBUTTONDBLCLK = 0x0203,
            WM_RBUTTONDOWN = 0x0204,
            WM_RBUTTONUP = 0x0205,
            WM_RBUTTONDBLCLK = 0x0206,
            WM_MBUTTONDOWN = 0x0207,
            WM_MBUTTONUP = 0x0208,
            WM_MBUTTONDBLCLK = 0x0209,
            WM_MOUSEWHEEL = 0x020A,
            WM_PARENTNOTIFY = 0x0210,
            WM_ENTERMENULOOP = 0x0211,
            WM_EXITMENULOOP = 0x0212,
            WM_NEXTMENU = 0x0213,
            WM_SIZING = 0x0214,
            WM_CAPTURECHANGED = 0x0215,
            WM_MOVING = 0x0216,
            WM_DEVICECHANGE = 0x0219,
            WM_MDICREATE = 0x0220,
            WM_MDIDESTROY = 0x0221,
            WM_MDIACTIVATE = 0x0222,
            WM_MDIRESTORE = 0x0223,
            WM_MDINEXT = 0x0224,
            WM_MDIMAXIMIZE = 0x0225,
            WM_MDITILE = 0x0226,
            WM_MDICASCADE = 0x0227,
            WM_MDIICONARRANGE = 0x0228,
            WM_MDIGETACTIVE = 0x0229,
            WM_MDISETMENU = 0x0230,
            WM_ENTERSIZEMOVE = 0x0231,
            WM_EXITSIZEMOVE = 0x0232,
            WM_DROPFILES = 0x0233,
            WM_MDIREFRESHMENU = 0x0234,
            WM_IME_SETCONTEXT = 0x0281,
            WM_IME_NOTIFY = 0x0282,
            WM_IME_CONTROL = 0x0283,
            WM_IME_COMPOSITIONFULL = 0x0284,
            WM_IME_SELECT = 0x0285,
            WM_IME_CHAR = 0x0286,
            WM_IME_REQUEST = 0x0288,
            WM_IME_KEYDOWN = 0x0290,
            WM_IME_KEYUP = 0x0291,
            WM_MOUSEHOVER = 0x02A1,
            WM_MOUSELEAVE = 0x02A3,
            WM_CUT = 0x0300,
            WM_COPY = 0x0301,
            WM_PASTE = 0x0302,
            WM_CLEAR = 0x0303,
            WM_UNDO = 0x0304,
            WM_RENDERFORMAT = 0x0305,
            WM_RENDERALLFORMATS = 0x0306,
            WM_DESTROYCLIPBOARD = 0x0307,
            WM_DRAWCLIPBOARD = 0x0308,
            WM_PAINTCLIPBOARD = 0x0309,
            WM_VSCROLLCLIPBOARD = 0x030A,
            WM_SIZECLIPBOARD = 0x030B,
            WM_ASKCBFORMATNAME = 0x030C,
            WM_CHANGECBCHAIN = 0x030D,
            WM_HSCROLLCLIPBOARD = 0x030E,
            WM_QUERYNEWPALETTE = 0x030F,
            WM_PALETTEISCHANGING = 0x0310,
            WM_PALETTECHANGED = 0x0311,
            WM_HOTKEY = 0x0312,
            WM_PRINT = 0x0317,
            WM_PRINTCLIENT = 0x0318,
            WM_HANDHELDFIRST = 0x0358,
            WM_HANDHELDLAST = 0x035F,
            WM_AFXFIRST = 0x0360,
            WM_AFXLAST = 0x037F,
            WM_PENWINFIRST = 0x0380,
            WM_PENWINLAST = 0x038F,
            WM_APP = 0x8000,
            WM_USER = 0x0400,
            WM_REFLECT = WM_USER + 0x1c00
        }


        //define the window menu message.

        public enum WindowMenuMessage : int
        {
            SC_SIZE = 0xF000,
            SC_MOVE = 0xF010,
            SC_MINIMIZE = 0xF020,
            SC_MAXIMIZE = 0xF030,
            SC_NEXTWINDOW = 0xF040,
            SC_PREVWINDOW = 0xF050,
            SC_CLOSE = 0xF060,
            SC_VSCROLL = 0xF070,
            SC_HSCROLL = 0xF080,
            SC_MOUSEMENU = 0xF090,
            SC_KEYMENU = 0xF100,
            SC_ARRANGE = 0xF110,
            SC_RESTORE = 0xF120,
            SC_TASKLIST = 0xF130,
            SC_SCREENSAVE = 0xF140,
            SC_HOTKEY = 0xF150,
            SC_DEFAULT = 0xF160,
            SC_MONITORPOWER = 0xF170,
            SC_CONTEXTHELP = 0xF180,
            SC_SEPARATOR = 0xF00F
        }

        /// <summary>

        /// Defines the style bits that a window can have

        /// </summary>

        public enum WindowStyles : uint
        {
            WS_BORDER = 0x800000,
            WS_CAPTION = 0xC00000,//               '  WS_BORDER Or WS_DLGFRAME

            WS_CHILD = 0x40000000,
            WS_CHILDWINDOW = (WS_CHILD),
            WS_CLIPCHILDREN = 0x2000000,
            WS_CLIPSIBLINGS = 0x4000000,
            WS_DISABLED = 0x8000000,
            WS_DLGFRAME = 0x400000,
            WS_EX_ACCEPTFILES = 0x10,
            WS_EX_DLGMODALFRAME = 0x1,
            WS_EX_NOPARENTNOTIFY = 0x4,
            WS_EX_TOPMOST = 0x8,
            WS_EX_TRANSPARENT = 0x20,
            WS_EX_TOOLWINDOW = 0x80,
            WS_EX_APPWINDOW = 0x40000,
            WS_GROUP = 0x20000,
            WS_HSCROLL = 0x100000,
            WS_MAXIMIZE = 0x1000000,
            WS_MAXIMIZEBOX = 0x10000,
            WS_MINIMIZE = 0x20000000,
            WS_MINIMIZEBOX = 0x20000,
            WS_OVERLAPPED = 0x0,
            WS_POPUP = 0x80000000,
            WS_SYSMENU = 0x80000,
            WS_TABSTOP = 0x10000,
            WS_THICKFRAME = 0x40000,
            WS_VISIBLE = 0x10000000,
            WS_VSCROLL = 0x200000,
            WS_ICONIC = WS_MINIMIZE,
            WS_POPUPWINDOW = (WS_POPUP | WS_BORDER | WS_SYSMENU),
            WS_SIZEBOX = WS_THICKFRAME,
            WS_TILED = WS_OVERLAPPED,
            WS_OVERLAPPEDWINDOW = (WS_OVERLAPPED | WS_CAPTION | WS_SYSMENU | WS_THICKFRAME | WS_MINIMIZEBOX | WS_MAXIMIZEBOX)
        }

        public struct WindowInfo
        {
            public int size;
            public Rectangle window;
            public Rectangle client;
            public int style;
            public int exStyle;
            public int windowStatus;
            public uint xWindowBorders;
            public uint yWindowBorders;
            public short atomWindowtype;
            public short creatorVersion;
        }

        public struct WindowPlacement
        {
            public int length;
            public int flags;
            public int showCmd;
            public Point minPosition;
            public Point maxPosition;
            public Rectangle normalPosition;
        }

        public struct Rect
        {
            public int left;
            public int top;
            public int right;
            public int bottom;

            public int Width
            {
                get
                {
                    return right - left;
                }
            }

            public int Height
            {
                get
                {
                    return bottom - top;
                }
            }
        }

        //constant for IACC.

        public enum IACC : int
        {
            //constant for MSAA interface.

            OBJID_WINDOW = 0,
            OBJID_CLIENT = -4,
        }

        public delegate bool EnumWindowEventHandler(IntPtr hWnd, Int32 lParam);

        [DllImport("user32.dll", EntryPoint = "GetCursorPos")]
        public static extern int GetCursorPos(ref POINT lpPoint);
        //public static unsafe extern int GetCursorPos(POINT* lpPoint);


        [DllImport("User32.dll")]
        public extern static void mouse_event(int dwFlags, int dx, int dy, int dwData, IntPtr dwExtraInfo);

        [DllImport("user32.dll", EntryPoint = "SetCursorPos")]
        public static extern bool SetCursorPos(int x, int y);

        [DllImport("user32.dll", EntryPoint = "WindowFromPoint")]
        public static extern IntPtr WindowFromPoint(int xPoint, int yPoint);

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

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

        //GUID of IAccessible interface

        public static Guid IACCUID = new Guid("618736e0-3c3d-11cf-810c-00aa00389b71");

        [DllImport("oleacc.dll")]
        public static extern uint GetStateText(uint dwStateBit, [Out] StringBuilder lpszStateBit, uint cchStateBitMax);

        [DllImport("oleacc.dll")]
        public static extern uint GetRoleText(uint dwRole, [Out] StringBuilder lpszRole, uint cchRoleMax);

        [DllImport("oleacc.dll")]
        public static extern IntPtr AccessibleObjectFromPoint(POINT pt, [Out, MarshalAs(UnmanagedType.Interface)] out IAccessible accObj, [Out] out object ChildID);

        [DllImport("oleacc.dll", ExactSpelling = true, PreserveSig = false)]
        [return: MarshalAs(UnmanagedType.Interface)]
        public static extern object AccessibleObjectFromWindow(IntPtr hwnd, int dwObjectID, ref Guid riid, ref IAccessible ppvObject);

        [DllImport("Oleacc.dll")]
        public static extern int AccessibleChildren(IAccessible paccContainer, int iChildStart, int cChildren, [Out] object[] rgvarChildren, out int pcObtained);

        [DllImport("oleacc.dll", PreserveSig = false)]
        [return: MarshalAs(UnmanagedType.Interface)]
        public static extern object ObjectFromLresult(UIntPtr lResult,
             [MarshalAs(UnmanagedType.LPStruct)] Guid refiid, IntPtr wParam);

        [DllImport("oleacc.dll", CharSet = CharSet.Ansi, SetLastError = true, ExactSpelling = true)]
        public  static extern Int32 ObjectFromLresult(Int32 lResult, ref Guid riid, Int32 wParam, out IHTMLDocument2 ppvObject);

        [DllImport("user32.dll")]
        public static extern int GetWindowModuleFileName(IntPtr hWnd, StringBuilder lpString, int nMaxCount);

        [DllImport("user32.dll")]
        public static extern int SetWindowPos(IntPtr hWnd, IntPtr hWndInsertAfter, int X, int Y, int cx, int cy, uint uFlags);

        [DllImport("user32.dll")]
        public static extern bool MoveWindow(IntPtr hWnd, int X, int Y, int nWidth, int nHeight, bool bRepaint);

        [DllImport("user32.dll")]
        public static extern bool GetWindowPlacement(IntPtr window, ref WindowPlacement position);

        [DllImport("User32.dll")]
        public static extern int RegisterWindowMessage(string message);

        [DllImport("User32.dll")]
        public static extern void EnumWindows(EnumWindowEventHandler callback, Int32 lParam);

        //		[DllImport("User32.dll")]

        //		public static extern Int32 GetWindowText(IntPtr hWnd, StringBuilder lpString, Int32 nMaxCount);


        [DllImport("User32.dll")]
        public static extern bool IsWindowVisible(IntPtr hWnd);

        [DllImport("User32.dll")]
        public static extern Int32 GetWindow(IntPtr hWnd, Int32 wCmd);

        [DllImport("User32.dll")]
        public static extern bool PrintWindow(IntPtr hwnd, IntPtr hDC, uint nFlags);

        //		[DllImport("User32.dll")]

        //		public static extern WindowStyles GetWindowLong(IntPtr hWnd, Int32 index);


        [DllImport("User32.dll")]
        public static extern IntPtr GetParent(IntPtr hWnd);

        [DllImport("User32.dll")]
        public static extern int GetClassName(IntPtr hWnd, StringBuilder lpClassName, int nMaxCount);

        [DllImport("User32.dll")]
        public static extern int GetWindowText(IntPtr hWnd, StringBuilder lpString, int nMaxCount);

        [DllImport("User32.dll")]
        public static extern WindowStyles GetWindowLong(IntPtr hWnd, int index);

        [DllImport("User32.dll")]
        public static extern int SendMessageTimeout(IntPtr hWnd, int uMsg, int wParam, int lParam, int fuFlags, int uTimeout, out UIntPtr lpdwResult);

        [DllImport("User32.dll")]
        public static extern int GetClassLong(IntPtr hWnd, int index);

        [DllImport("User32.dll")]
        public static extern int GetWindowThreadProcessId(IntPtr hWnd, out int processId);

        [DllImport("User32.dll")]
        public unsafe static extern UInt32 SendInput(UInt32 nInputs, INPUT* pInputs, int cbSize);

        [DllImport("User32.dll")]
        public static extern UInt32 SendInput(UInt32 nInputs, INPUT[] pInputs, int cbSize);

        [DllImport("User32.dll")]
        public static extern int SendMessage(IntPtr hWnd, int uMsg, int wParam, int lParam);

        [DllImport("User32.dll")]
        public static extern int SendMessage(IntPtr hWnd, int Msg, IntPtr wParam, string lParam);

        [DllImport("User32.dll")]
        public static extern int PostMessage(IntPtr hWnd, int uMsg, int wParam, int lParam);

        [DllImport("User32.dll")]
        public static extern void SwitchToThisWindow(IntPtr hWnd, int altTabActivated);

        [DllImport("User32.dll")]
        public static extern int ShowWindowAsync(IntPtr hWnd, int command);

        [DllImport("User32.dll")]
        public static extern bool ShowWindow(IntPtr hWnd, int nCmdShow);

        [DllImport("user32.dll")]
        public static extern IntPtr GetDesktopWindow();

        [DllImport("user32.dll")]
        public static extern IntPtr GetForegroundWindow();

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

        [DllImport("user32.dll")]
        public static extern bool BringWindowToTop(IntPtr window);

        [DllImport("user32.dll")]
        public static extern bool GetWindowInfo(IntPtr hwnd, ref WindowInfo info);

        [DllImport("user32.dll")]
        public static extern IntPtr GetWindowDC(IntPtr hwnd);

        [DllImport("user32.dll")]
        public static extern IntPtr GetDC(IntPtr hwnd);

        [DllImport("user32.dll")]
        public static extern Int32 ReleaseDC(IntPtr hwnd, IntPtr hdc);

        [DllImport("user32.dll")]
        public static extern bool GetWindowRect(IntPtr hwnd, ref Rect rectangle);

        [DllImport("user32.dll")]
        public static extern bool GetClientRect(IntPtr hwnd, ref Rect rectangle);

        [DllImport("user32.dll")]
        public static extern IntPtr GetMessageExtraInfo();

        //[DllImport("user32.dll")]

        //public static extern IntPtr WindowFromPoint(Point pt);


        [DllImport("user32.dll")]
        public static extern IntPtr SetCapture(IntPtr hWnd);

        [DllImport("user32.dll")]
        public static extern int ReleaseCapture();

        //[DllImport("user32.dll")]

        //public static extern IntPtr SelectObject(IntPtr hDc, IntPtr hObject);


        [DllImport("user32.dll")]
        public static extern IntPtr GetStockObject(int nObject);

        [DllImport("user32.dll")]
        public static extern int InvalidateRect(IntPtr hWnd, IntPtr lpRect, int bErase);

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

        [DllImport("user32.dll")]
        public static extern int RedrawWindow(IntPtr hWnd, IntPtr lprcUpdate, IntPtr hrgnUpdate, uint flags);

        [DllImport("user32.dll")]
        public static extern IntPtr GetActiveWindow();

        [DllImport("user32.dll")]
        public static extern IntPtr SetActiveWindow(IntPtr hWnd);

        #endregion Windows


        #region GDI - gdi32.dll


        public enum BinaryRasterOperations
        {
            R2_BLACK = 1,   /*  0       */
            R2_NOTMERGEPEN = 2,   /* DPon     */
            R2_MASKNOTPEN = 3,   /* DPna     */
            R2_NOTCOPYPEN = 4,   /* PN       */
            R2_MASKPENNOT = 5,   /* PDna     */
            R2_NOT = 6,   /* Dn       */
            R2_XORPEN = 7,   /* DPx      */
            R2_NOTMASKPEN = 8,   /* DPan     */
            R2_MASKPEN = 9,   /* DPa      */
            R2_NOTXORPEN = 10,  /* DPxn     */
            R2_NOP = 11,  /* D        */
            R2_MERGENOTPEN = 12,  /* DPno     */
            R2_COPYPEN = 13,  /* P        */
            R2_MERGEPENNOT = 14,  /* PDno     */
            R2_MERGEPEN = 15,  /* DPo      */
            R2_WHITE = 16,  /*  1       */
            R2_LAST = 16
        }

        public enum TernaryRasterOperations
        {
            SRCCOPY = 0x00CC0020, /* dest = source                   */
            SRCPAINT = 0x00EE0086, /* dest = source OR dest           */
            SRCAND = 0x008800C6, /* dest = source AND dest          */
            SRCINVERT = 0x00660046, /* dest = source XOR dest          */
            SRCERASE = 0x00440328, /* dest = source AND (NOT dest )   */
            NOTSRCCOPY = 0x00330008, /* dest = (NOT source)             */
            NOTSRCERASE = 0x001100A6, /* dest = (NOT src) AND (NOT dest) */
            MERGECOPY = 0x00C000CA, /* dest = (source AND pattern)     */
            MERGEPAINT = 0x00BB0226, /* dest = (NOT source) OR dest     */
            PATCOPY = 0x00F00021, /* dest = pattern                  */
            PATPAINT = 0x00FB0A09, /* dest = DPSnoo                   */
            PATINVERT = 0x005A0049, /* dest = pattern XOR dest         */
            DSTINVERT = 0x00550009, /* dest = (NOT dest)               */
            BLACKNESS = 0x00000042, /* dest = BLACK                    */
            WHITENESS = 0x00FF0062 /* dest = WHITE                    */

        }

        public const int SRCCOPY = 0x00CC0020;

        [DllImport("gdi32.dll")]
        public static extern bool BitBlt(IntPtr hdcDst, int xDst, int yDst, int cx, int cy, IntPtr hdcSrc, int xSrc, int ySrc, uint ulRop);

        [DllImport("gdi32.dll")]
        public static extern bool StretchBlt(IntPtr hdcDst, int xDst, int yDst, int cx, int cy, IntPtr hdcSrc, int xSrc, int ySrc, int cxSrc, int cySrc, uint ulRop);

        [DllImport("gdi32.dll")]
        public static extern IntPtr CreateDC(IntPtr lpszDriver, string lpszDevice, IntPtr lpszOutput, IntPtr lpInitData);

        [DllImport("gdi32.dll")]
        public static extern IntPtr DeleteDC(IntPtr hdc);

        [DllImport("gdi32.dll")]
        public static extern IntPtr CreateCompatibleBitmap(IntPtr hDC, int nWidth, int nHeight);

        [DllImport("gdi32.dll")]
        public static extern IntPtr CreateCompatibleDC(IntPtr hDC);

        [DllImport("gdi32.dll")]
        public static extern bool DeleteObject(IntPtr hObject);

        [DllImport("gdi32.dll")]
        public static extern IntPtr SelectObject(IntPtr hDC, IntPtr hObject);

        #endregion


        #region Shlwapi.dll


        [DllImport("Shlwapi.dll")]
        public static extern string PathGetArgs(string path);

        public static string SafePathGetArgs(string path)
        {
            try
            {
                return WinApi.PathGetArgs(path);
            }
            catch (System.Exception) { }
            return string.Empty;
        }

        [DllImport("Shlwapi.dll")]
        public static extern int PathCompactPathEx(
            System.Text.StringBuilder pszOut, /* Address of the string that has been altered */
            System.Text.StringBuilder pszSrc, /* Pointer to a null-terminated string of max length (MAX_PATH) that contains the path to be altered */
            uint cchMax,					  /* Maximum number of chars to be contained in the new string, including the null character. Example: cchMax = 8, then 7 chars will be returned, the last for the null character. */
            uint dwFlags);					  /* Reserved */

        public static string PathCompactPathEx(string source, uint maxChars)
        {
            StringBuilder pszOut = new StringBuilder((int)WinApi.MAX_PATH);
            StringBuilder pszSrc = new StringBuilder(source);

            int result = WinApi.PathCompactPathEx(pszOut, pszSrc, maxChars, (uint)0);
            if (result == 1)
                return pszOut.ToString();
            else
            {
                System.Diagnostics.Debug.WriteLine("Win32.PathCompactPathEx failed to compact the path '" + source + "' down to '" + maxChars + "' characters.");
                return string.Empty;
            }
        }

        #endregion


        #region Hotkeys


        [Flags()]
        public enum HotkeyModifiers
        {
            MOD_ALT = 0x0001,
            MOD_CONTROL = 0x0002,
            MOD_SHIFT = 0x0004,
            MOD_WIN = 0x0008
        }

        [DllImport("User32")]
        public static extern int RegisterHotKey(IntPtr hWnd, int id, uint modifiers, uint virtualkeyCode);

        [DllImport("User32")]
        public static extern int UnregisterHotKey(IntPtr hWnd, int id);

        [DllImport("Kernel32")]
        public static extern short GlobalAddAtom(string atomName);

        [DllImport("Kernel32")]
        public static extern short GlobalDeleteAtom(short atom);

        #endregion


        [DllImport("User32")]
        public static extern int LockWindowUpdate(IntPtr windowHandle);

        public static short MAKEWORD(byte a, byte b)
        {
            return ((short)(((byte)(a & 0xff)) | ((short)((byte)(b & 0xff))) << 8));
        }

        public static byte LOBYTE(short a)
        {
            return ((byte)(a & 0xff));
        }

        public static byte HIBYTE(short a)
        {
            return ((byte)(a >> 8));
        }

        public static int MAKELONG(short a, short b)
        {
            return (((int)(a & 0xffff)) | (((int)(b & 0xffff)) << 16));
        }

        public static short HIWORD(int a)
        {
            return ((short)(a >> 16));
        }

        public static short LOWORD(int a)
        {
            return ((short)(a & 0xffff));
        }

        [DllImport("Kernel32")]
        public static extern int CopyFile(string source, string destination, int failIfExists);
    }

};

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