C-sharp-code

        [DllImport("user32.dll", SetLastError = true)]
        public static extern IntPtr FindWindowEx(IntPtr parentHandle, IntPtr childAfter, string className, string windowTitle);

        // For Windows Mobile, replace user32.dll with coredll.dll
        [DllImport("user32.dll", SetLastError = true)]
        public static extern IntPtr FindWindow(string lpClassName, string lpWindowName);

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

        [DllImport("user32.dll", SetLastError = true, CharSet = CharSet.Auto)]
        static extern int GetWindowTextLength(IntPtr hWnd);

        [DllImport("user32.dll", SetLastError = true)]
        static extern IntPtr GetWindow(IntPtr hWnd, uint uCmd);

        enum GetWindow_Cmd : uint
        {
            GW_HWNDFIRST = 0,
            GW_HWNDLAST = 1,
            GW_HWNDNEXT = 2,
            GW_HWNDPREV = 3,
            GW_OWNER = 4,
            GW_CHILD = 5,
            GW_ENABLEDPOPUP = 6
        }

        [DllImport("user32.dll", ExactSpelling = true, CharSet = CharSet.Auto)]
        public static extern IntPtr GetParent(IntPtr hWnd);

        [DllImport("user32.dll", SetLastError = true, CharSet = CharSet.Auto)]
        static extern bool SendNotifyMessage(IntPtr hWnd, uint Msg, UIntPtr wParam,
           IntPtr lParam);

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

        [DllImport("user32.dll", SetLastError = true, CharSet = CharSet.Auto)]
        static extern uint RegisterWindowMessage(string lpString);

        [Flags]
        enum SendMessageTimeoutFlags : uint
        {
            SMTO_NORMAL = 0x0,
            SMTO_BLOCK = 0x1,
            SMTO_ABORTIFHUNG = 0x2,
            SMTO_NOTIMEOUTIFNOTHUNG = 0x8,
            SMTO_ERRORONEXIT = 0x20
        }

        [DllImport("user32.dll", SetLastError = true, CharSet = CharSet.Auto)]
        public static extern IntPtr SendMessageTimeout(
            IntPtr hWnd,
            uint Msg,
            UIntPtr wParam,
            IntPtr lParam,
            SendMessageTimeoutFlags fuFlags,
            uint uTimeout,
            out UIntPtr lpdwResult);

        [DllImport("user32.dll", SetLastError = true, CharSet = CharSet.Auto)]
        public static extern IntPtr SendMessageTimeout(
            IntPtr windowHandle,
            uint Msg,
            IntPtr wParam,
            IntPtr lParam,
            SendMessageTimeoutFlags flags,
            uint timeout,
            out IntPtr result);

        /* Version specifically setup for use with WM_GETTEXT message */

        [DllImport("user32.dll", EntryPoint = "SendMessageTimeout", SetLastError = true, CharSet = CharSet.Auto)]
        public static extern uint SendMessageTimeoutText(
            IntPtr hWnd,
            int Msg,              // Use WM_GETTEXT
            int countOfChars,
            StringBuilder text,
            SendMessageTimeoutFlags flags,
            uint uTImeoutj,
            out IntPtr result);

        /* Version for a message which returns an int, such as WM_GETTEXTLENGTH. */

        [DllImport("user32.dll", EntryPoint = "SendMessageTimeout", CharSet = CharSet.Auto)]
        public static extern int SendMessageTimeout(
            IntPtr hwnd,
            uint Msg,
            int wParam,
            int lParam,
            uint fuFlags,
            uint uTimeout,
            out int lpdwResult);
        // Find window by Caption only. Note you must pass IntPtr.Zero as the first parameter.
        [DllImport("user32.dll", EntryPoint = "FindWindow", SetLastError = true)]
        public static extern IntPtr FindWindowByCaption(IntPtr ZeroOnly, string lpWindowName);

                    private struct UUID{
                        public long Data1;
                        public int Data2, Data3;
                        public byte[] Data4();
                    }


        public IHTMLDocument  GetWinIEDOM(IntPtr hWnd){
                             UUID typUUID;
                             UIntPtr lngRes;
                             uint lngMsg, uTimeout = 1000;
            
                lngMsg = RegisterWindowMessage("WM_HTML_GETOBJECT");
                if( lngMsg != 0){
                    SendMessageTimeout(hWnd, lngMsg, UIntPtr.Zero, IntPtr.Zero, SendMessageTimeoutFlags.SMTO_ABORTIFHUNG, uTimeout, out lngRes);
                    if (lngRes != UIntPtr.Zero)
                    {
                    
                                                typUUID.Data1 = &H626FC520;
                            typUUID.Data2 = &HA41E;
                            typUUID.Data3 = &H11CF;
                            typUUID.Data4[0] = &HA7;
                            typUUID.Data4[1] = &H31;
                            typUUID.Data4[2] = &H0;
                            typUUID.Data4[3] = &HA0;
                            typUUID.Data4[4] = &HC9;
                            typUUID.Data4[5] = &H8;
                            typUUID.Data4[6] = &H26;
                            typUUID.Data4[7] = &H37;
                            typUUID.Data4[8] = &H38;
                    }

                        ObjectFromLresult(lngRes, (Guid)typUUID, IntPtr.Zero);
}

        }