Пример #1
0
        private void btn_quaylai_Click(object sender, EventArgs e)
        {
            frmlop f1 = new frmlop();

            f1.Show();
            this.Hide();
        }
Пример #2
0
        private void lỚPToolStripMenuItem_Click(object sender, EventArgs e)
        {
            frmlop f3 = new frmlop();

            f3.Show();
        }