private void quảnLýMượnToolStripMenuItem_Click(object sender, EventArgs e) { frmLapPhieuMuon a = new frmLapPhieuMuon(); a.MdiParent = this; a.Show(); }
private void quảnLýMượnSáchToolStripMenuItem_Click(object sender, EventArgs e) { Form phieu = new frmLapPhieuMuon(); phieu.MdiParent = this; phieu.Show(); }