基于MFC自绘制按钮自定义背景，且能获取音乐文件时间信息，时间滚动条随音乐的播放自动滑动并显示当前播放进度，很适合新手借鉴-MFC-based self-drawn button custom background and music file time information, automatic sliding time scroll bar with the music player and displays the current playback progress, very suit