Sets a category for a promoted action.
Promoted actions appear in the ribbon on a page. You promote an action by setting the Promoted Property. Categories allow you to group similar actions under a common caption. You can choose between 10 categories: New, Process, Report, and Category4 through Category10. By default, the category names are used as the captions in the ribbon. For information about changing the captions, see How to: Define Promoted Action Categories Captions for the Ribbon.