This class creates a ribbon button.

Autodesk.AutoCAD.Customization.ElementBase
    Autodesk.AutoCAD.Customization.VersionableElement
        Autodesk.AutoCAD.Customization.CustomizationElement
            Autodesk.AutoCAD.Customization.RibbonItem
                Autodesk.AutoCAD.Customization.RibbonButton

Public Class RibbonButton
Inherits RibbonItem

public class RibbonButton : RibbonItem;