Split the dialog box is a lot of trouble, I have looked into doing a Demo, provide for your reference, I pro-test, totally easy to use, rest assured download!

SpliterDemo\DialogShow.cpp
...........\DialogShow.h
...........\MainFrm.cpp
...........\MainFrm.h
...........\ReadMe.txt
...........\res\SpliterDemo.ico
...........\...\SpliterDemo.rc2
...........\...\SpliterDemoDoc.ico
...........\...\Toolbar.bmp
...........\resource.h
...........\SpliterDemo.cpp
...........\SpliterDemo.h
...........\SpliterDemo.rc
...........\SpliterDemo.vcproj
...........\SpliterDemo.vcproj.UNMV7ZUGR3P2EIV.Administrator.user
...........\SpliterDemoDoc.cpp
...........\SpliterDemoDoc.h
...........\SpliterDemoView.cpp
...........\SpliterDemoView.h
...........\stdafx.cpp
...........\stdafx.h
...........\targetver.h
SpliterDemo.sln
...........\res
SpliterDemo

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