Application object: Returns a CommandBars collection that represents all the command bars in PowerPoint. Read-only.
Presentation object: Returns a CommandBars collection that represents the merged command bar set from the host container application and PowerPoint. This property returns a valid object only when the container is a DocObject server, like Microsoft Binder, and PowerPoint is acting as an OLE server. Read-only.
For information about returning a single member of a collection, see Returning an Object from a Collection.