Exemplo n.º 1
0
        private void button2_Click(object sender, EventArgs e)
        {
            btnmat4 lv4 = new btnmat4();

            lv4.Show();
            this.Close();
        }
        private void btncaudung_Click(object sender, EventArgs e)
        {
            //MessageBox.Show("Chúc mừng bạn đã hoàn thành");
            btnmat4 mat4 = new btnmat4();

            mat4.Show();
            this.Close();
        }