对CScrollView增加放大和缩小能力
...............................\Debug
...............................\.....\BuildLog.htm
...............................\.....\MAINFRM.obj
...............................\.....\MAINFRM.sbr
...............................\.....\mt.dep
...............................\.....\STDAFX.obj
...............................\.....\STDAFX.sbr
...............................\.....\TEST.obj
...............................\.....\TEST.res
...............................\.....\TEST.sbr
...............................\.....\TESTDOC.obj
...............................\.....\TESTDOC.sbr
...............................\.....\TESTVIEW.obj
...............................\.....\TESTVIEW.sbr
...............................\.....\vc80.idb
...............................\.....\vc80.pdb
...............................\.....\Zoom32.bsc
...............................\.....\Zoom32.exe
...............................\.....\Zoom32.exe.embed.manifest
...............................\.....\Zoom32.exe.embed.manifest.res
...............................\.....\Zoom32.exe.intermediate.manifest
...............................\.....\Zoom32.ilk
...............................\.....\Zoom32.pdb
...............................\.....\ZOOMVIEW.obj
...............................\.....\ZOOMVIEW.sbr
...............................\MAINFRM.CPP
...............................\MAINFRM.H
...............................\RES
...............................\RESOURCE.H
...............................\...\TEST.ICO
...............................\...\TEST.RC2
...............................\...\TESTDOC.ICO
...............................\...\TOOLBAR.BMP
...............................\...\ZOOMCURS.CUR
...............................\STDAFX.CPP
...............................\STDAFX.H
...............................\TEST.APS
...............................\TEST.CLW
...............................\TEST.CPP
...............................\TEST.H
...............................\TEST.RC
...............................\TESTDOC.CPP
...............................\TESTDOC.H
...............................\TESTVIEW.CPP
...............................\TESTVIEW.H
...............................\WDJ_ZOOM.TXT
...............................\ZOOM16.DEF
...............................\ZOOM16.MAK
...............................\ZOOM32.DSP
...............................\ZOOM32.DSW
...............................\ZOOM32.MAK
...............................\ZOOM32.OPT
...............................\ZOOM32.PLG
...............................\ZOOM32.sln
...............................\ZOOM32.suo
...............................\Zoom32.vcproj
...............................\Zoom32.vcproj.DVTECH.110613w.user
...............................\ZOOMVIEW.CPP
...............................\ZOOMVIEW.H