Undo/Redo Class 

Ultimate ToolBox  COXUndo class is intended to allow undo capabilities to be easily added to any CDocument derived class.
Features:
•	Very easy to implement 
•	Minimal change required in an existing project to add undo/redo 
•	Number of levels of undo/redo easily configurable 
•	Allows some performance tuning 
•	Easy integration with standard edit menu and toolbar 
•	Allows Undo/Redo description to be added to menu entries