private void btnCancel_Click(object sender, EventArgs e) { this.Hide(); GV_QLCauHoi frm = new GV_QLCauHoi(); frm.Show(); }
private void btnQLCauHoi_Click(object sender, EventArgs e) { GV_QLCauHoi frm = new GV_QLCauHoi(); frm.ShowDialog(); }