private void quảnLíKháchHàngToolStripMenuItem_Click(object sender, EventArgs e) { frmQuanLyKhachHang frm = new frmQuanLyKhachHang(); frm.MdiParent = this; frm.Show(); }
private void btnChon_Click(object sender, EventArgs e) { frmQLKH = new frmQuanLyKhachHang(); DialogResult dr = frmQLKH.ShowDialog(this); }