/// <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;  
}