reciveing window.postMessage

        public IE.WebBrowser IEApp
        {
            get
            {
                return (this.IEObj as IE.WebBrowser);
            }
        }
 
        public mshtml.HTMLDocument HTMLDocument
        {
            get
            {
                return (this.HTMLDocumentObj as mshtml.HTMLDocument);
            }
        }

        Window3OnScroll_EventListener onscroll;
        Window3OnMessage_EventListener onmessage;

        [ComVisible(true)]
        [ClassInterface(ClassInterfaceType.AutoDispatch)]
        public class Window3OnScroll_EventListener
        {
            IEModule module;

            internal Window3OnScroll_EventListener(IEModule module)
            {
                this.module = module;
            }

            [DispId(0)]
            public void HandleEvent(object pEvtObj)
            {
                try
                {
                }
                catch (Exception)
                {
                }
                finally
                {
                    if (pEvtObj != null)
                        Marshal.ReleaseComObject(pEvtObj);
                }
            }
        }

        [ComVisible(true)]
        [ClassInterface(ClassInterfaceType.AutoDispatch)]
        public class Window3OnMessage_EventListener
        {
            IEModule module;

            internal Window3OnMessage_EventListener(IEModule module)
            {
                this.module = module;
            }

            [DispId(0)]
            public void HandleEvent(object pEvtObj)
            {
                try
                {
                    mshtml.IHTMLEventObj2 event_ = pEvtObj as mshtml.IHTMLEventObj2;
                    if (event_ != null)
                        MessageBox.Show(this.module, "OnMessage handler");
                }
                catch (Exception)
                {
                }
                finally
                {
                    if (pEvtObj != null)
                        Marshal.ReleaseComObject(pEvtObj);
                }
            }
        }

        private void IEModule_OnConnect(object sender, int threadId)
        {
            this.onscroll = new Window3OnScroll_EventListener(this);
            this.onmessage = new Window3OnMessage_EventListener(this);
        }

        private void adxieContextMenuCommandItem1_OnClick(object sender, object htmlElement)
        {
            HTMLDocument.parentWindow.GetType().InvokeMember("postMessage", BindingFlags.InvokeMethod, null, HTMLDocument.parentWindow, new object[] { "Message", "*" });
        }

        private void IEModule_DocumentComplete2(object pDisp, string url, bool rootDocLoaded)
        {
            if (rootDocLoaded)
            {
                mshtml.IHTMLWindow3 hWnd3 = HTMLDocument.parentWindow as mshtml.IHTMLWindow3;
                if (hWnd3 != null)
                {
                    try
                    {
                        hWnd3.attachEvent("onscroll", this.onscroll);
                        hWnd3.attachEvent("onmessage", this.onmessage);
                    }
                    catch (Exception)
                    {
                    }
                }
            }
        }