实例2  带背景音乐的程序主界面\DeskUP.BMP
.............................\PY.WAV
.............................\soundmain_app.exe
.............................\soundmain_app.pbd
.............................\soundmain_app.pbl
.............................\soundmain_app.pbt
.............................\SoundMain_Workspace.pbw
实例2  带背景音乐的程序主界面