private void Form2_Load(object sender, EventArgs e)

        {

            foreach (Control c in groupBox1.Controls)//遍历groupBox1内的所有控件

            {

                if (c is CheckBox)//只遍历CheckBox控件

                {

                    ((CheckBox)c).CheckStateChanged += new EventHandler(chk_CheckedChanged);

                }

            }

        }

        private void chk_CheckedChanged(object sender, EventArgs e)

        {

            if (((CheckBox)sender).CheckState.ToString() == "Checked")

            {

                listBox1.Items.Add(((CheckBox)sender).Text);

            }

            else

            {

                listBox1.Items.Remove(((CheckBox)sender).Text);

            }

        }