捕捉窗口关闭事件（转贴）-.NET教程,Windows开发

public class whoisresult : system.windows.forms.form
{
………………………..
private bool tangseng = false;
}
private void initializecomponent()
{
………………………..
this.closing += new canceleventhandler(this.whoisresult_cancel);
}

        protected void whoisresult_cancel(object sender,canceleventargs e)
        {
            if(!tangseng)
            {
                e.cancel = true;
                tangseng = true;
                messagebox.show("悟空，你也太调皮了，每次都要我提醒你，诶~~~");
            }
            else
            {
                e.cancel = false;
                messagebox.show("这次总算学乖了");
            }
        }

窗体关闭事件可以取消，通过设置cancel属性