class Program
    {      
        static void Main(string[] args)
        {
            Form b = new Form();
            MyForm c = new MyForm(b);
            c.myform.ShowDialog();
        }
    }

  public  class MyForm
    {
        public Form myform;
        public Button mybutton;
      public  MyForm( Form a)
        {
            this.myform = a;
            this.mybutton = new Button();
            mybutton.Text = "bt";
            //form面板里面添加控件
            myform.Controls.Add(mybutton);
            //声明事件，+=方法名
            mybutton.Click +=Myclick ;
        }
        /// <summary>
        /// 事件处理器，vs自动填充
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e">事件参数</param>
        public void Myclick(object sender, EventArgs e)
        {
            MessageBox.Show("ok");
        }

    }