'宣言 Protected Overrides Function GetCloseButtonVisibility( _ ByVal tab As Infragistics.Win.UltraWinTabs.ITabItem _ ) As Infragistics.Win.UltraWinTabs.TabCloseButtonVisibility
protected override Infragistics.Win.UltraWinTabs.TabCloseButtonVisibility GetCloseButtonVisibility( Infragistics.Win.UltraWinTabs.ITabItem tab )