'宣言 Public Function New( _ ByVal previousSelectedTabItem As RibbonTabItem, _ ByVal newSelectedTabItem As RibbonTabItem _ )
public RibbonTabItemSelectedEventArgs( RibbonTabItem previousSelectedTabItem, RibbonTabItem newSelectedTabItem )
RibbonTabItemSelectedEventArgs クラス RibbonTabItemSelectedEventArgs メンバ