private void nhânViênToolStripMenuItem_Click(object sender, EventArgs e) { NhanVien frm = new NhanVien(); frm.MdiParent = this; frm.Show(); }
private void buttonItem3_Click(object sender, EventArgs e) { NhanVien nv = new NhanVien(); nv.MdiParent = this; nv.Show(); // this.Hide(); }