private void button_slhangve_Click(object sender, EventArgs e) { QL_Hangve frm = new QL_Hangve(); frm.UIParent = this; frm.ShowDialog(); }
private void quảnLýHạngVéToolStripMenuItem_Click(object sender, EventArgs e) { QL_Hangve frm = new QL_Hangve(); frm.ShowDialog(); }