如何控制窗口的关闭事件

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 

原文转自：http://www.ltesting.net