用mcisendstring实现一个简单的播放AVI的播放器。可以定位到某一特定的帧，同时可以把该帧截图保存为一个bmp文件。-Mcisendstring with the player to achieve a simple AVI player. Can be targeted to a particular frame, the frame at the same time can be saved as a bmp screenshot file.

MFC平台利用MciSendString实现音乐文件播放，功能相对简单，但是封装好了该类对象，方便使用。-MFC platform utilizes MciSendString realize music file playback, function is relatively simple, but a good package of such objects, easy to use.