Description: This is an example of can step back, using the Command pattern, namely the object properties can be rolled back
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File list (Check if you may need any files):
Command.h
MainFrm.h
MyObjCollection.h
MyObjCommand.h
MyObject.h
Resource.h
StdAfx.h
TestUndo.h
TestUndoDoc.h
TestUndoView.h
VChildFrm.h
MainFrm.cpp
MyObjCollection.cpp
MyObjCommand.cpp
MyObject.cpp
StdAfx.cpp
TChildFrm.cpp
TestUndo.cpp
TestUndoDoc.cpp
TestUndoView.cpp
res\Toolbar.bmp
TestUndo.aps
TestUndo.clw
TestUndo.dsp
TestUndo.dsw
res\TestUndo.ico
res\TestUndoDoc.ico
TestUndo.ncb
TestUndo.opt
TestUndo.plg
TestUndo.rc
res\TestUndo.rc2
TestUndo.sln
TestUndo.suo
TestUndo.vcproj
TestUndo.rar
res
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