'Declaration
 
Public Function Undo( _
   ByVal sender As System.Object _
) As System.Boolean

'Usage
 
Dim instance As ColumnGroupHeaderExpandUndoAction
Dim sender As System.Object
Dim value As System.Boolean
 
value = instance.Undo(sender)

public System.bool Undo( 
   System.object sender
)

Parameters

sender

Object on which the action occurred.

Return Value

Target Platforms: Windows 7, Windows 8 Desktop, Windows Vista SP1 or later, Windows Server 2000, Windows 2000 Professional, Windows XP Professional, Windows NT 4.0 Workstation, SP6, Windows NT 4.0 Server, SP6

Reference

ColumnGroupHeaderExpandUndoAction Class
ColumnGroupHeaderExpandUndoAction Members