CMFCToolBarButton::IsExtraSize
Determines whether the button can be displayed with an extended border.
virtual BOOL IsExtraSize() const;
Return Value
Nonzero if the toolbar button can be displayed with an extended border; otherwise 0.
Remarks
Several skins use extra size for the borders of toolbar buttons (for example, round buttons).
If the user moves this button from one toolbar to another, the framework calls the CMFCToolBarButton::OnChangeParentWnd method. The CMFCToolBarButton::OnChangeParentWnd method sets the extra size flag to that of the new parent toolbar (for more information, see CMFCToolBar::IsButtonExtraSizeAvailable).
Requirements
Header: afxtoolbarbutton.h