public class WebBrowserExtendedEvents : System.Runtime.InteropServices.StandardOleMarshalObject, DWebBrowserEvents2

    {

        ExtendedWebBrowser _Browser;

        public WebBrowserExtendedEvents(ExtendedWebBrowser browser) { _Browser = browser; }



        //Implement whichever events you wish

        public void BeforeNavigate2(object pDisp, ref object URL, ref object flags, ref object targetFrameName, ref object postData, ref object headers, ref bool cancel)

        {

            _Browser.OnBeforeNavigate((string)URL, (string)targetFrameName, out cancel);

        }



        public void NewWindow3(object pDisp, ref bool cancel, ref object flags, ref object URLContext, ref object URL)

        {

            _Browser.OnBeforeNewWindow((string)URL, out cancel);

        }



    }



    public class WebBrowserExtendedNavigatingEventArgs : CancelEventArgs

    {

        private string _Url;

        public string Url

        {

            get { return _Url; }

        }



        private string _Frame;

        public string Frame

        {

            get { return _Frame; }

        }



        public WebBrowserExtendedNavigatingEventArgs(string url, string frame)

            : base()

        {

            _Url = url;

            _Frame = frame;

        }

    }



    [System.Runtime.InteropServices.ComImport(), System.Runtime.InteropServices.Guid("34A715A0-6587-11D0-924A-0020AFC7AC4D"),

    System.Runtime.InteropServices.InterfaceTypeAttribute(System.Runtime.InteropServices.ComInterfaceType.InterfaceIsIDispatch),

    System.Runtime.InteropServices.TypeLibType(System.Runtime.InteropServices.TypeLibTypeFlags.FHidden)]

    public interface DWebBrowserEvents2

    {



        [System.Runtime.InteropServices.DispId(250)]

        void BeforeNavigate2(

            [System.Runtime.InteropServices.In,

            System.Runtime.InteropServices.MarshalAs(System.Runtime.InteropServices.UnmanagedType.IDispatch)] object pDisp,

            [System.Runtime.InteropServices.In] ref object URL,

            [System.Runtime.InteropServices.In] ref object flags,

            [System.Runtime.InteropServices.In] ref object targetFrameName, [System.Runtime.InteropServices.In] ref object postData,

            [System.Runtime.InteropServices.In] ref object headers,

            [System.Runtime.InteropServices.In,

            System.Runtime.InteropServices.Out] ref bool cancel);

        [System.Runtime.InteropServices.DispId(273)]

        void NewWindow3(

            [System.Runtime.InteropServices.In,

            System.Runtime.InteropServices.MarshalAs(System.Runtime.InteropServices.UnmanagedType.IDispatch)] object pDisp,

            [System.Runtime.InteropServices.In, System.Runtime.InteropServices.Out] ref bool cancel,

            [System.Runtime.InteropServices.In] ref object flags,

            [System.Runtime.InteropServices.In] ref object URLContext,

            [System.Runtime.InteropServices.In] ref object URL);

    }



 public partial class ExtendedWebBrowser : System.Windows.Forms.WebBrowser

    {

        #region 变量



        AxHost.ConnectionPointCookie cookie;

        WebBrowserExtendedEvents events;

        

        

        //窗口事件

        public event EventHandler BeforeNavigate;

        public event EventHandler BeforeNewWindow;



        #endregion



        



        #region 窗口事件

        [PermissionSet(SecurityAction.LinkDemand, Name = "FullTrust")]

        protected override void CreateSink()

        {

            //MAKE SURE TO CALL THE BASE or the normal events won't fire

            base.CreateSink();

            events = new WebBrowserExtendedEvents(this);

            cookie = new System.Windows.Forms.AxHost.ConnectionPointCookie(this.ActiveXInstance, events, typeof(DWebBrowserEvents2));

        }



        [PermissionSet(SecurityAction.LinkDemand, Name = "FullTrust")]

        protected override void DetachSink()

        {

            if (null != cookie)

            {

                cookie.Disconnect();

                cookie = null;

            }

            base.DetachSink();

        }



        public void OnBeforeNewWindow(string url, out bool cancel)

        {

            EventHandler h = BeforeNewWindow;

            WebBrowserExtendedNavigatingEventArgs args = new WebBrowserExtendedNavigatingEventArgs(url, null);

            if (null != h)

            {

                h(this, args);

            }

            cancel = args.Cancel;

        }



        public void OnBeforeNavigate(string url, string frame, out bool cancel)

        {

            EventHandler h = BeforeNavigate;

            WebBrowserExtendedNavigatingEventArgs args = new WebBrowserExtendedNavigatingEventArgs(url, frame);

            if (null != h)

            {

                h(this, args);

            }

            //Pass the cancellation chosen back out to the events

            cancel = args.Cancel;

        } 

        #endregion



    }