添加引用：using mshtml;(C:\Program Files (x86)\Microsoft.NET\Primary Interop Assemblies\Microsoft.mshtml.dll)页面上放webBrowser控件。给Url一个网页地址。放一按钮button，click事件下：mshtml.HTMLDocument doc1 = (mshtml.HTMLDocument)this.webBrowser1.Document.DomDocument;mshtml.HTMLDocumentEvents2_Event hevent = (mshtml.HTMLDocumentEvents2_Event)doc1;hevent.onmouseout += new HTMLDocumentEvents2_onmouseoutEventHandler(hevent_onmouseout);hevent.onmouseover += new HTMLDocumentEvents2_onmouseoverEventHandler(hevent_onmouseover);hevent.onmousedown += new HTMLDocumentEvents2_onmousedownEventHandler(hevent_onmousedown);其中的三个方法：string oldcolor = "";void hevent_onmouseover(IHTMLEventObj e){oldcolor = e.toElement.style.border;e.toElement.style.border = "2px solid blue";//this.textBox2.Text = e.toElement.parentElement.innerHTML;string path = "";IHTMLElement element = e.toElement;this.textBox3.Text = element.className;while (element.parentElement != null){IHTMLElementCollection elementCollection = element.parentElement.children as IHTMLElementCollection;path = element.tagName + "(" + elementCollection.length + ")/" + path;element = element.parentElement;}this.textBox3.Text = path;}void hevent_onmouseout(IHTMLEventObj pEvtObj){pEvtObj.fromElement.style.border = oldcolor;}void hevent_onmousedown(IHTMLEventObj pEvtObj){mshtml.HTMLDocument doc1 = (mshtml.HTMLDocument)this.webBrowser1.Document.DomDocument;mshtml.HTMLDocumentEvents2_Event hevent = (mshtml.HTMLDocumentEvents2_Event)doc1;hevent.onmouseover -= new mshtml.HTMLDocumentEvents2_onmouseoverEventHandler(this.hevent_onmouseover);pEvtObj.toElement.style.background = oldcolor;hevent.onmouseout -= new HTMLDocumentEvents2_onmouseoutEventHandler(this.hevent_onmouseout);hevent.onmousedown -= new HTMLDocumentEvents2_onmousedownEventHandler(hevent_onmousedown);}这样就实现了。运行，点击下按钮，，然后鼠标放在某个DOM元素上，就将该元素选中，就会用兰色框起来。
人的价值，在遭受诱-惑的一瞬间被决定
