The name is Custom UI Editor Tool. 2007 Microsoft Office System Brand New" ribbon" The interface must have fascinated a lot of people, but did you know that this is a completely open interface, developers can define using open OpenXML to add definitions, make Office 2007 appear as they want, you can add new groups and controls, hide existing elements. This tool is one of the first OpenXML development tools to define the UI of Office 2007, we are more like a trial, or a demonstration of the advantages of the open mechanism of Office 2007?