Short description of Add-in Express 2007 for VSTO 2008.4.0: Use visual designers of this component set to create professional extensions for Microsoft Office in VSTO 2005 (SE) and VSTO 2008. Enjoy lots of advanced features: customize Office 2007 Ribbon UI and Office 2003 toolbars at design-time, add elements to Ribbon tabs, the Quick Access Toolbar and Office Menu and validate the resulting Ribbon XML in no time. C# and VB.NET are supported. Read more at https://www.add-in-express.com/add-in-vsto/