Generic API to use the camera of windows mobile device.

这是运行在windows下的程序，主要是利用了windows的api来实现了音频的采集和回访功能，其中用到了g711编码方式。后来我将此源码用于window mobile上（稍作修改）同样可以正确执行-This is a program running under the windows, mainly using the windows api to achieve the acquisition of audio and returning function, which uses g711