扩展实例2 会发声的按钮\BCMenu.cpp
......................\BCMenu.h
......................\BtnST.cpp
......................\BtnST.h
......................\res\ringin.wav
......................\...\test.ico
......................\...\test.rc2
......................\Resource.h
......................\StdAfx.cpp
......................\StdAfx.h
......................\test.cpp
......................\test.dsp
......................\test.dsw
......................\test.h
......................\test.ncb
......................\test.opt
......................\test.plg
......................\test.rc
......................\testDlg.cpp
......................\testDlg.h
......................\Debug
......................\res
扩展实例2 会发声的按钮