![](dotnetdiagramimages/GrapeCity_Silverlight_SpreadSheet_UI_GrapeCity_Windows_SpreadSheet_UI_UndoRedo_ColumnGroupHeaderExpandUndoAction.png)
'Declaration Public Class ColumnGroupHeaderExpandUndoAction Inherits ActionBase Implements GrapeCity.Windows.SpreadSheet.UI.IUndo
'Usage Dim instance As ColumnGroupHeaderExpandUndoAction
public class ColumnGroupHeaderExpandUndoAction : ActionBase, GrapeCity.Windows.SpreadSheet.UI.IUndo
System.Object
GrapeCity.Windows.SpreadSheet.UI.UndoRedo.ActionBase
GrapeCity.Windows.SpreadSheet.UI.UndoRedo.ColumnGroupHeaderExpandUndoAction