Represents an extension of a OfficeRibbon object.
[System.Runtime.InteropServices.Guid("EBFD1E8E-CCED-4E54-9DE9-D8E1E445FC2D")] public interface IRibbonExtension : IDisposable, Microsoft.Office.Tools.IExtension
The IRibbonExtension interface is implemented by the RibbonBase class. This is the base class of the class that Visual Studio generates in your project when you add a Ribbon (Visual Designer) item to an Office project in Visual Studio.
Gets the object that is being extended by this IExtension.(Inherited from IExtension)