private void toolMuonTra_Click(object sender, EventArgs e) { frmMuonSach fMuonSach = new frmMuonSach(); foreach (Form frm in this.MdiChildren) { frm.Close(); } fMuonSach.MdiParent = this; fMuonSach.Show(); }
private void mượnSáchToolStripMenuItem_Click(object sender, EventArgs e) { frmMuonSach frmMuonSach = new frmMuonSach(); foreach (Form frm in this.MdiChildren) { frm.Close(); } frmMuonSach.MdiParent = this; frmMuonSach.Show(); }