/// <summary>

/// 返回指定WebBrowser中图片<IMG></IMG>中的图内容

/// </summary>

/// <param name="WebCtl">WebBrowser控件</param>

/// <param name="ImgeTag">IMG元素</param>

/// <returns>IMG对象</returns>

private Image GetWebImage(WebBrowser WebCtl, HtmlElement ImgeTag)

{

    HTMLDocument doc = (HTMLDocument)WebCtl.Document.DomDocument;

    HTMLBody body = (HTMLBody)doc.body;

    IHTMLControlRange rang = (IHTMLControlRange)body.createControlRange();

    IHTMLControlElement Img = (IHTMLControlElement)ImgeTag.DomElement; //图片地址

    Image oldImage = Clipboard.GetImage();

    rang.add(Img);

    rang.execCommand("Copy", false, null);  //拷贝到内存

    Image numImage = Clipboard.GetImage();

    try

    {

        Clipboard.SetImage(oldImage);

    }

    catch

    {

    }

    return numImage;

}

HtmlElement ImgeTag = webBrowser2.Document.All["id"];//根据验证码id获取元素,根据实际情况更改

Image numPic = GetWebImage(webBrowser2, ImgeTag); // 得到验证码图片

piccode.Image = numPic;