Can be used Fourier transform industry. The use of windows of the acm audio library, the following is my program code, I used no problem. You can refer to.

Packet : 99274152006052508240523376.rar filelist
DrawGraphics\ReadMe.txt
DrawGraphics\DrawGraphics.dsw
DrawGraphics\DrawGraphics.h
DrawGraphics\StdAfx.h
DrawGraphics\StdAfx.cpp
DrawGraphics\CEllipse.h
DrawGraphics\CLine.h
DrawGraphics\DrawGraphics.ncb
DrawGraphics\DrawGraphics.plg
DrawGraphics\DLineDlg1.cpp
DrawGraphics\Circle.cpp
DrawGraphics\CCircle.cpp
DrawGraphics\DrawGraphics.clw
DrawGraphics\DLineProperty.h
DrawGraphics\MainFrm.cpp
DrawGraphics\CRectangle.h
DrawGraphics\DLineDlg1.h
DrawGraphics\MainFrm.h
DrawGraphics\CEllipse.cpp
DrawGraphics\CRectangle.cpp
DrawGraphics\CLine.cpp
DrawGraphics\DLineProperty.cpp
DrawGraphics\PloyGon2.cpp
DrawGraphics\RoundRect.cpp
DrawGraphics\RoundRect.h
DrawGraphics\DrawGraphicsDoc.h
DrawGraphics\Circle.h
DrawGraphics\Bezier.h
DrawGraphics\CGraph.cpp
DrawGraphics\CGraph.h
DrawGraphics\Bezier2.cpp
DrawGraphics\Bezier.cpp
DrawGraphics\Ploygon.cpp
DrawGraphics\Bezier2.h
DrawGraphics\Ploygon.h
DrawGraphics\PloyGon2.h
DrawGraphics\DrawGraphicsDoc.cpp
DrawGraphics\DLineDlg2.h
DrawGraphics\DLineDlg2.cpp
DrawGraphics\DrawGraphicsView.h
DrawGraphics\DrawGraphicsView.cpp
DrawGraphics\CovDlg.cpp
DrawGraphics\resource.h
DrawGraphics\CovDlg.h
DrawGraphics\DrawGraphics.cpp
DrawGraphics\DrawGraphics.aps
DrawGraphics\DrawGraphics.rc
DrawGraphics\DrawGraphics.dsp
DrawGraphics\DrawGraphics.opt
DrawGraphics\Debug
DrawGraphics\res\DrawGraphics.rc2
DrawGraphics\res\DrawGraphicsDoc.ico
DrawGraphics\res\cur00003.cur
DrawGraphics\res\background.bmp
DrawGraphics\res\bottom.BMP
DrawGraphics\res\exit_foc.bmp
DrawGraphics\res\exit_nor.bmp
DrawGraphics\res\Flag.gif
DrawGraphics\res\Left.BMP
DrawGraphics\res\logo.bmp
DrawGraphics\res\max_focu.bmp
DrawGraphics\res\max_norm.bmp
DrawGraphics\res\min_focu.bmp
DrawGraphics\res\min_norm.bmp
DrawGraphics\res\res_focu.bmp
DrawGraphics\res\res_norm.bmp
DrawGraphics\res\Right.BMP
DrawGraphics\res\Top.bmp
DrawGraphics\res\bitmap_d.bmp
DrawGraphics\res\bitmap10.bmp
DrawGraphics\res\bitmap2.bmp
DrawGraphics\res\bitmap3.bmp
DrawGraphics\res\bitmap4.bmp
DrawGraphics\res\bitmap5.bmp
DrawGraphics\res\bitmap6.bmp
DrawGraphics\res\bitmap7.bmp
DrawGraphics\res\bitmap8.bmp
DrawGraphics\res\bitmap9.bmp
DrawGraphics\res\bmp00004.bmp
DrawGraphics\res\bmp00005.bmp
DrawGraphics\res\bmp00006.bmp
DrawGraphics\res\bmp00007.bmp
DrawGraphics\res\bmp00008.bmp
DrawGraphics\res\bmp00009.bmp
DrawGraphics\res\bmp00010.bmp
DrawGraphics\res\Toolbar.bmp
DrawGraphics\res\bezer.cur
DrawGraphics\res\cur00002.cur
DrawGraphics\res\ellipse.cur
DrawGraphics\res\line.cur
DrawGraphics\res\rectangl.cur
DrawGraphics\res\circle.cur
DrawGraphics\res\cursor1.cur
DrawGraphics\res\cur00001.cur
DrawGraphics\res\stardock.ico
DrawGraphics\res\3Dimpact.ico
DrawGraphics\res\DrawGraphics.ico
DrawGraphics\res\toolbar1.bmp
DrawGraphics\res\coverd.jpg.psd
DrawGraphics\res\covu.bmp
DrawGraphics\res\covd.bmp
DrawGraphics\res\bmp00001.bmp
DrawGraphics\res
DrawGraphics\Globals\Globals.h
DrawGraphics\Globals\Globals.cpp
DrawGraphics\Globals
DrawGraphics\Tools\ButtonXP.cpp
DrawGraphics\Tools\ButtonXP.h
DrawGraphics\Tools\ComboBoxXP.cpp
DrawGraphics\Tools\ComboBoxXP.h
DrawGraphics\Tools\Draw.cpp
DrawGraphics\Tools\Draw.h
DrawGraphics\Tools\ListBoxXP.cpp
DrawGraphics\Tools\ListBoxXP.h
DrawGraphics\Tools\MenuXP.cpp
DrawGraphics\Tools\MenuXP.h
DrawGraphics\Tools\MyTrace.cpp
DrawGraphics\Tools\MyTrace.h
DrawGraphics\Tools\NewMenu.cpp
DrawGraphics\Tools\NewMenu.h
DrawGraphics\Tools\Popup.cpp
DrawGraphics\Tools\Popup.h
DrawGraphics\Tools\StatusBarXP.cpp
DrawGraphics\Tools\StatusBarXP.h
DrawGraphics\Tools\ToolBarXP.cpp
DrawGraphics\Tools\ToolbarXP.h
DrawGraphics\Tools\Tools.cpp
DrawGraphics\Tools\Tools.h
DrawGraphics\Tools\WinMgrDlg.cpp
DrawGraphics\Tools\WinMgrDlg.h
DrawGraphics\Tools
DrawGraphics

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