'Declaration Protected Overridable Sub OnRibbonTabItemOpening( _ ByVal args As RibbonTabItemOpeningEventArgs _ )
protected virtual void OnRibbonTabItemOpening( RibbonTabItemOpeningEventArgs args )
Target Platforms: Windows 10, Windows 8.1, Windows 8, Windows 7, Windows Server 2012, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2