private void thốngKêToolStripMenuItem_Click(object sender, EventArgs e) { CloseAll(); frmThongKe frmThongKe = new frmThongKe(); frmThongKe.MdiParent = this; frmThongKe.Show(); }
private void btnThongKe_Click(object sender, EventArgs e) { frmThongKe frm = new frmThongKe(); frm.ShowDialog(); }