The framework calls this method when it fills the background of a toolbar button.
virtual void OnFillButtonInterior(
   CDC* pDC,
   CMFCToolBarButton* pButton,
   CRect rect,
   CMFCVisualManager::AFX_BUTTON_STATE state
);
Parameters
- [in] pDC 
 A pointer to the device context of a toolbar button.
- [in] pButton 
 A pointer to a CMFCToolBarButton. The framework fills the background for this button.
- [in] rect 
 A rectangle that specifies the boundaries of the toolbar button.
- [in] state 
 The state of the toolbar button.
Remarks
The default implementation of this method uses the default color to fill the background. Override this method in a derived visual manager to customize the background of a toolbar button.
The possible states of a toolbar button are ButtonsIsRegular, ButtonsIsPressed, or ButtonsIsHighlighted.
Requirements
Header: afxvisualmanager.h