drag the window border to resize the window, the parent window is a dialog

ChangeDlgSize
.............\ChangeDlgSize
.............\.............\ChangeDlgSize.aps
.............\.............\ChangeDlgSize.cpp
.............\.............\ChangeDlgSize.h
.............\.............\ChangeDlgSize.rc
.............\.............\ChangeDlgSize.vcproj
.............\.............\ChangeDlgSize.vcproj.PC-201204082055.Administrator.user
.............\.............\ChangeDlgSizeDlg.cpp
.............\.............\ChangeDlgSizeDlg.h
.............\.............\Debug
.............\.............\.....\BuildLog.htm
.............\.............\.....\ChangeDlgSize.exe.embed.manifest
.............\.............\.....\ChangeDlgSize.exe.embed.manifest.res
.............\.............\.....\ChangeDlgSize.exe.intermediate.manifest
.............\.............\.....\ChangeDlgSize.obj
.............\.............\.....\ChangeDlgSize.pch
.............\.............\.....\ChangeDlgSize.res
.............\.............\.....\ChangeDlgSizeDlg.obj
.............\.............\.....\DlgChild.obj
.............\.............\.....\DlgParent.obj
.............\.............\.....\mt.dep
.............\.............\.....\stdafx.obj
.............\.............\.....\vc80.idb
.............\.............\.....\vc80.pdb
.............\.............\DlgChild.cpp
.............\.............\DlgChild.h
.............\.............\DlgParent.cpp
.............\.............\DlgParent.h
.............\.............\ReadMe.txt
.............\.............\res
.............\.............\...\ChangeDlgSize.ico
.............\.............\...\ChangeDlgSize.rc2
.............\.............\resource.h
.............\.............\stdafx.cpp
.............\.............\stdafx.h
.............\ChangeDlgSize.ncb
.............\ChangeDlgSize.sln
.............\ChangeDlgSize.suo

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