public PdfViewerForm() { InitializeComponent(); UpdateGlass(); pdfViewer.DocumentCreator = "PDF Viewer Demo"; pdfViewer.DocumentProducer = "Developer Express Inc., " + AssemblyInfo.Version; UserLookAndFeel.Default.SetSkinStyle("Office 2016 Colorful"); pdfViewer.CreateRibbon(); foreach (RibbonPage page in ribbonControl.Pages) { if (page.Text == "PDF Viewer") { popupSkins.BeginUpdate(); popupSkins.Ribbon = ribbonControl; checkItemAllowFormSkins = new BarCheckItem(ribbonControl.Manager); checkItemAllowFormSkins.Caption = "Allow Form Skins"; checkItemAllowFormSkins.ItemClick += new ItemClickEventHandler(OnAllowFormSkinsItemClick); popupSkins.AddItem(checkItemAllowFormSkins); SkinHelper.InitSkinPopupMenu(popupSkins); popupSkins.ItemLinks[1].BeginGroup = true; popupSkins.EndUpdate(); popupSkins.Popup += new EventHandler(OnPmSkinsPopup); RibbonPageGroup skinsPage = new RibbonPageGroup(ribbonGallerySkins.Caption); SkinHelper.InitSkinGallery(ribbonGallerySkins, true); skinsPage.CaptionButtonClick += new RibbonPageGroupEventHandler(OnSkinsPageCaptionButtonClick); skinsPage.ItemLinks.Add(ribbonGallerySkins); RibbonPageGroup devExpressPage = new RibbonPageGroup("DevExpress"); devExpressPage.ShowCaptionButton = false; AddBarItem(devExpressPage, "Getting Started", "GetStarted", OnGettingStartedItemClicked); AddBarItem(devExpressPage, "Get Free Support", "GetSupport", OnGetFreeSupportItemClicked); AddBarItem(devExpressPage, "Buy Now", "BuyNow", OnBuyNowItemClicked); AddBarItem(devExpressPage, "About", "Info", OnAboutItemClicked); page.Groups.AddRange(new RibbonPageGroup[] { skinsPage, devExpressPage }); break; } } mainFormText = Text; pdfViewer.DocumentChanged += new PdfDocumentChangedEventHandler(OnPdfViewerDocumentChanged); pdfViewer.UriOpening += OnPdfViewerUriOpening; pdfViewer.LoadDocument(GetDocumentStream()); }