【手记】WebBrowser响应页面中的blank开新窗口及window.close关闭本窗体

private void wb_NewWindow(object sender, CancelEventArgs e)
{
    e.Cancel = true;//这句加不加在我的环境里没区别，不加也不会导致打开外部浏览器
    new FmWebBrowser(wb.StatusText).Show(); //FmWebBrowser即我的承载wb的窗体，本类构造函数接受一个url，Show之后会令wb访问该url。另外，该事件进入时，wb的StatusText几乎可以断定就是所点链接的href，极端情况以后遇到再说
}

using System;
using System.Security.Permissions;
using System.Windows.Forms;

namespace AhDung.WinForm.Controls
{
    /// <summary>
    /// 增强型浏览器
    /// </summary>
    public class WebBrowserEx : WebBrowser
    {
        /// <summary>
        /// 当WebBrowser关闭后
        /// </summary>
        public event EventHandler WindowClosed;

        protected void OnWindowClosed(EventArgs e)
        {
            if (WindowClosed != null) { WindowClosed(this, e); }
        }

        [PermissionSet(SecurityAction.LinkDemand, Name = "FullTrust")]
        protected override void WndProc(ref Message m)
        {
            if (m.Msg == 0x210/*WM_PARENTNOTIFY*/)
            {
                int wp = m.WParam.ToInt32();

                int X = wp & 0xFFFF;
                if (X == 0x2/*WM_DESTROY*/)//若收到该消息，引发WindowClosed事件
                {
                    OnWindowClosed(EventArgs.Empty);
                }
            }

            base.WndProc(ref m);
        }
    }
}

private WebBrowserEx wbex = new WebBrowserEx();
...

public FmMain()
{
    wbex.WindowClosed += wbex_WindowClosed;
    ...
}

void wbex_WindowClosed(object sender, System.EventArgs e)
{
    this.Close();
}