private void simpleButton9_Click(object sender, EventArgs e)
        {
            Form frm = ktraform(typeof(Frm_KhachHang));

            if (frm == null)
            {
                Frm_KhachHang f = new Frm_KhachHang();
                f.Show();
            }
            else
            {
                frm.Activate();
            }
        }
Exemple #2
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        private void btn_DSKH_ItemClick(object sender, ItemClickEventArgs e)
        {
            Form frm = ktraform(typeof(Frm_KhachHang));

            if (frm == null)
            {
                Frm_KhachHang f = new Frm_KhachHang();
                f.MdiParent = this;
                f.Show();
            }
            else
            {
                frm.Activate();
            }
        }