应用程序中改变音量大小的实现方法

The Method of Changing Sound Volume in Application Program

介绍在应用程序中通过编程实现调节音量大小的方法 ,并给出一个简单的示例的部分源程序。

This passage intreouces a method to change volumeof sound by programming in application program, and lists a part of source file so as to explain.