Called by the framework to draw the border of a popup menu.
virtual void OnDrawMenuBorder(
    CDC* pDC,
    CMFCRibbonPanelMenuBar* pMenuBar
);
Parameters
- [in] pDC 
 This parameter is not used.
- [in] pMenuBar 
 This parameter is not used.
Remarks
By default this method does nothing. Override this method to draw the border of a popup menu.
Requirements
Header: afxribboncategory.h