原帖及讨论：http://bbs.bc-cn.net/dispbbs.asp?BoardID=117&ID=106377

/// form1为基类
namespace WindowsApplication1
{
    public partial class Form1 : Form
    {
        //我自定义的事件
        public event EventHandler  myevent;
      
        public Form1()
        {
            InitializeComponent();
        }
        public  void myfunc(int a, int b)
        {
            if (myevent != null)
            {
                myevent(null , null);
            }
        }
    }
}

/// form2从form1派生，form2为执行类
namespace WindowsApplication1
{
    public partial class Form2 : Form1
    {
        Form1 f = new Form1();

        public Form2()
        {
            InitializeComponent();
            f.myevent += new System.EventHandler(diaoyong);
        }    

        public void diaoyong(object o,EventArgs e)
        {

            MessageBox.Show ("派生类执行");
        }

        private void button1_Click(object sender, EventArgs e)
        {
            f.myfunc(1, 1);
        }
        
    }
}
运行结果是 ： 弹出对话框"派生类执行";
public Form2()
        {
            InitializeComponent();
            f.myevent += new System.EventHandler(diaoyong);//这里是注册
        }  

myevent(null , null);//这是执行，调用的就是所注册的 diaoyong()