I can use the Fourier transform to use the acm audio library of Windows. Here is a code from my program. I have no problem with it. You can refer to it.

Filename	Size	Update
bBezier.cpp	3917	2003-01-10
Bezier2.cpp	3613	2003-01-10
Bezier2.h	973	2003-01-10
CCircle.cpp
CEllipse.cpp	4416	2003-01-08
CEllipse.h	800	2003-01-08
CGraph.cpp	3331	2003-01-12
CGraph.h	2028	2003-01-12
Circle.cpp	5136	2003-01-09
Circle.h	877	2003-01-08
CLine.cpp	5697	2003-01-07
CLine.h	716	2003-01-07
CovDlg.cpp	1780	2003-01-12
CovDlg.h	1307	2003-01-12
CRectangle.cpp	4362	2003-01-07
CRectangle.h	791	2003-01-08
Debug
DLineDlg1.cpp	9391	2003-01-01
DLineDlg1.h	2429	2002-12-31
DLineDlg2.cpp	34575	2003-01-12
DLineDlg2.h	2510	2003-01-12
DLineProperty.cpp	4199	2003-01-01
DLineProperty.h	1707	2003-01-01
DrawGraphics.aps	732248	2006-05-24
DrawGraphics.clw	7131	2006-05-24
DrawGraphics.cpp	4991	2003-01-12
DrawGraphics.dsp	10601	2003-01-12
DrawGraphics.dsw	549	2002-10-31
DrawGraphics.h	1469	2002-11-11
DrawGraphics.ncb	926720	2006-05-24
DrawGraphics.opt	79872	2006-05-24
DrawGraphics.plg	5967	2006-05-24
DrawGraphics.rc	27578	2003-01-12
DrawGraphicsDoc.cpp	5428	2003-01-12
DrawGraphicsDoc.h	2139	2003-01-10
DrawGraphicsView.cpp	26974	2003-01-12
DrawGraphicsView.h	3957	2003-01-12
Globals
Globals\Globals.cpp	356	2002-11-07
Globals\Globals.h	392	2002-11-07
MainFrm.cpp	14567	2003-01-02
MainFrm.h	2644	2003-01-02
Ploygon.cpp	7244	2003-01-11
Ploygon.h	876	2003-01-11
PloyGon2.cpp	2497	2003-01-10
PloyGon2.h	759	2003-01-10
ReadMe.txt	4455	2002-10-31
res
resource.h	7469	2003-01-12
res\3Dimpact.ico	766	2003-01-06
res\background.bmp	160318	2002-11-11
res\bezer.cur	326	2002-12-21
res\bitmap10.bmp	1270	2002-12-17
res\bitmap2.bmp	1270	2002-12-17
res\bitmap3.bmp	1270	2002-12-17
res\bitmap4.bmp	1270	2002-12-17
res\bitmap5.bmp	1270	2002-12-17
res\bitmap6.bmp	1406	2002-12-17
res\bitmap7.bmp	1270	2002-12-17
res\bitmap8.bmp	1270	2002-12-17
res\bitmap9.bmp	1270	2002-12-17
res\bitmap_d.bmp	1270	2002-12-17
res\bmp00001.bmp	146304	2003-01-12
res\bmp00004.bmp	1270	2002-12-17
res\bmp00005.bmp	1270	2002-12-17
res\bmp00006.bmp	1270	2002-12-17
res\bmp00007.bmp	1270	2002-12-17
res\bmp00008.bmp	1270	2002-12-17
res\bmp00009.bmp	1270	2002-12-17
res\bmp00010.bmp	1270	2002-12-17
res\bottom.BMP	4198	2002-11-11
res\circle.cur	326	2003-01-02
res\covd.bmp	146304	2003-01-12
res\coverd.jpg.psd	359727	2003-01-12
res\covu.bmp	146304	2003-01-12
res\cur00001.cur	326	2003-01-05
res\cur00002.cur	326	2002-12-21
res\cur00003.cur	326	2003-01-07
res\cursor1.cur	326	2003-01-05
res\DrawGraphics.ico	1078	2003-01-06
res\DrawGraphics.rc2	404	2002-10-31
res\DrawGraphicsDoc.ico	1078	2002-10-31
res\ellipse.cur	326	2002-12-21
res\exit_foc.bmp	774	2002-11-11
res\exit_nor.bmp	774	2002-11-11
res\Flag.gif	14333	2002-08-15
res\Left.BMP	2598	2002-11-11
res\line.cur	326	2002-12-21
res\logo.bmp	8454	2002-11-11
res\max_focu.bmp	774	2002-11-11
res\max_norm.bmp	774	2002-11-11
res\min_focu.bmp	774	2002-11-11
res\min_norm.bmp	774	2002-11-11
res\rectangl.cur	326	2002-12-20
res\res_focu.bmp	774	2002-11-11
res\res_norm.bmp	774	2002-11-11
res\Right.BMP	2598	2002-11-11
res\stardock.ico	6006	2003-01-05
res\Toolbar.bmp	1078	2002-12-20
res\toolbar1.bmp	1558	2003-01-12

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