用MCI控制波形声音的播放。编译、链接并运行程序。当用户按下“Open”按钮时，弹出“打开”对话框，可以随意选定某个波形音频文件（*.wav）。选定文件后，可以按“播放”按钮进行声音的播放，在播放过程中还可以再次按“播放”按钮使声音暂停或继续播放。按“停止”按钮则停止播放，按“退出”按钮则退出应用程序。 -Sound wave with the MCI control to play. Compile, link and run the program. When the user presses the " Open"　button, the pop-up " Open"　dialog box, you can freely select a waveform audio file (*. wav). Selected file, you can press the " Play"　button for sound playback, during playback can also press the " Play"　button to pause or continue playing the sound. Press " Stop"　button to stop playback, press the " Exit"　button will exit the application.