private void Phong_GUI_Load(object sender, EventArgs e) { txtsl.Text = lpbl.slp("Standard"); int t = 0; foreach (DevExpress.XtraTab.XtraTabPage tab in xtraTabPhong.TabPages) { if (tab.Text == "Standard") { xtraTabPhong.SelectedTabPage = tab; t = 1; } } if (t != 1) { at.setTab(xtraTabPhong, "Standard", new Standard_GUI()); } }