The code is based on MFC, can be used to achieve a view of the slider control to zoom in and out to achieve control of the project. Use the slider can be used as a reference code.

滑轮控制视图放大与缩小\Debug\Viewport.exe
......................\.....\Viewport.ilk
......................\.....\Viewport.pdb
......................\UpgradeLog.XML
......................\Viewport\ChildFrm.cpp
......................\........\ChildFrm.h
......................\........\Debug\BuildLog.htm
......................\........\.....\ChildFrm.obj
......................\........\.....\MainFrm.obj
......................\........\.....\mt.dep
......................\........\.....\MyDialogBar.obj
......................\........\.....\stdafx.obj
......................\........\.....\vc90.idb
......................\........\.....\vc90.pdb
......................\........\.....\Viewport.exe.embed.manifest
......................\........\.....\Viewport.exe.embed.manifest.res
......................\........\.....\Viewport.exe.intermediate.manifest
......................\........\.....\Viewport.obj
......................\........\.....\Viewport.pch
......................\........\.....\Viewport.res
......................\........\.....\ViewportDoc.obj
......................\........\.....\ViewportView.obj
......................\........\MainFrm.cpp
......................\........\MainFrm.h
......................\........\MyDialogBar.cpp
......................\........\MyDialogBar.h
......................\........\ReadMe.txt
......................\........\res\Toolbar.bmp
......................\........\...\Viewport.ico
......................\........\...\Viewport.rc2
......................\........\...\ViewportDoc.ico
......................\........\Resource.h
......................\........\stdafx.cpp
......................\........\stdafx.h
......................\........\Viewport.aps
......................\........\Viewport.cpp
......................\........\Viewport.h
......................\........\Viewport.rc
......................\........\Viewport.vcproj
......................\........\Viewport.vcproj.8.00.old
......................\........\Viewport.vcproj.MM-A370C05F1096.brenda.user
......................\........\Viewport.vcproj.TB507-15.Administrator.user
......................\........\Viewport.vcproj.TB507-19.Administrator.user
......................\........\ViewportDoc.cpp
......................\........\ViewportDoc.h
......................\........\ViewportView.cpp
......................\........\ViewportView.h
......................\Viewport.ncb
......................\Viewport.sln
......................\Viewport.sln.old
......................\Viewport.suo
......................\_UpgradeReport_Files\UpgradeReport.css
......................\....................\UpgradeReport.xslt
......................\....................\UpgradeReport_Minus.gif
......................\....................\UpgradeReport_Plus.gif
......................\Viewport\Debug
......................\........\res
......................\Debug
......................\Viewport
......................\_UpgradeReport_Files
滑轮控制视图放大与缩小

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