'宣言 Public Function GetPreviousVisibleTabItemInRow( _ ByVal tab As Infragistics.Win.UltraWinTabs.ITabItem _ ) As Infragistics.Win.UltraWinTabs.ITabItem
public Infragistics.Win.UltraWinTabs.ITabItem GetPreviousVisibleTabItemInRow( Infragistics.Win.UltraWinTabs.ITabItem tab )