SdiSquares(鼠标选择方格，并能保存和恢复)
........................................\MainFrm.cpp
........................................\MainFrm.h
........................................\ReadMe.txt
........................................\res

........................................\...\SdiSquares.rc2

........................................\resource.h
........................................\SdiSquares.aps
........................................\SdiSquares.clw
........................................\SdiSquares.cpp
........................................\SdiSquares.dsp
........................................\SdiSquares.dsw
........................................\SdiSquares.h
........................................\SdiSquares.ncb
........................................\SdiSquares.opt
........................................\SdiSquares.plg
........................................\SdiSquares.rc
........................................\SdiSquares.reg
........................................\SquaresDoc.cpp
........................................\SquaresDoc.h
........................................\SquaresView.cpp
........................................\SquaresView.h
........................................\StdAfx.cpp
........................................\StdAfx.h