//Cars private void navBarItem1_LinkClicked(object sender, NavBarLinkEventArgs e) { try { restForeColorOfNavBarItem(); NavBarItem navBarItem = (NavBarItem)sender; navBarItem.Appearance.ForeColor = Color.Blue; if (!xtraTabControlCarsContent.Visible) { xtraTabControlCarsContent.Visible = true; } XtraTabPage xtraTabPage = getTabPage(xtraTabControlCarsContent, "السيارات"); if (xtraTabPage == null) { xtraTabControlCarsContent.TabPages.Add("السيارات"); xtraTabPage = getTabPage(xtraTabControlCarsContent, "السيارات"); } xtraTabPage.Controls.Clear(); xtraTabControlCarsContent.SelectedTabPage = xtraTabPage; Cars objForm = new Cars(this); objForm.TopLevel = false; xtraTabPage.Controls.Add(objForm); objForm.FormBorderStyle = System.Windows.Forms.FormBorderStyle.None; objForm.Dock = DockStyle.Fill; //objForm.DisplayAtaqm(); objForm.Show(); } catch (Exception ex) { MessageBox.Show(ex.Message); } }