The framework calls this method when it draws the border of a CMFCRibbonButton that is positioned on the Main panel.
virtual void OnDrawRibbonMainPanelButtonBorder(
   CDC* pDC,
   CMFCRibbonButton* pButton
);
Parameters
- [in] pDC 
 A pointer to a device context.
- [in] pButton 
 A pointer to a CMFCRibbonButton located on the main panel of the ribbon. The framework draws the border for this button.
Remarks
Override this method in a derived visual manager to customize the appearance of the border for a CMFCRibbonButton on the Main panel.
Requirements
Header: afxvisualmanager.h