The framework calls this method when it draws a caption button located on the ribbon bar.
virtual void OnDrawRibbonCaptionButton(
   CDC* pDC,
   CMFCRibbonCaptionButton* pButton
);
Parameters
- pDC 
 A pointer to a device context.
- pButton 
 A pointer to a CMFCRibbonCaptionButton Class. The framework draws this caption button.
Remarks
Override this method in a derived visual manager to customize the appearance of a caption button on the ribbon.
Requirements
Header: afxvisualmanager.h