控件共享事件

  private System.Windows.Forms.Button btn1;
  private System.Windows.Forms.Button btn2;
  private System.Windows.Forms.Button btn3;
  private System.Windows.Forms.Label lblMsg;

        private void btn1_Click(object sender, System.EventArgs e)
        ...{
            Button btnHit;
            btnHit = (Button)(sender);
            lblMsg.Text = "你单击了" + btnHit.Text;    

        }