Assembly: Microsoft.Office.Tools.Common (in Microsoft.Office.Tools.Common.dll)
This property can be set at run time only under certain conditions. For more information, see Ribbon Object Model Overview.
To load the image, add code to the LoadImage event handler. Check the ImageName property of the RibbonLoadImageEventArgs and set the Image property of the RibbonLoadImageEventArgs object to the image that you want to load.
This property is ignored if either the Image property or the OfficeImageId property is set. Images identified by the property can be loaded slightly faster than images identified by the Image property, because the Office application retrieves the image from your solution only the first time the Ribbon is displayed.
The ShowImage property must be true for the control to display the image. When you set the property at design time, Visual Studio automatically sets the ShowImage property to true. If you set the property at run time, you must set the ShowImage property to true in your code.