This example illustrates how to enable Undo functionality in an application.
Private Sub Form_Load()
'UndoLevels must be set at form load to allocate undo buffers
ImgEdit1.UndoLevels = 1
End Sub
Private Sub cmdUndo_Click()
'The Undo method will undo the last imaging operation
'performed.
ImgEdit1.Undo
End Sub