说明：  自主开发的代码，位置是主窗体播放控件的事件中。数据库有更改，添加了新的表用于返回操作，因为是初级编程员，没办法，，SQL导入了拼音缩写标量值函数，用于支持拼音搜索界面中的特殊搜索。窗体可以最小化和拖动。更多详情请下载本文件了解，使用了一些特殊代码，对初级编程员了解编程帮助极大。
(Independent development of code, the location is the main window playback control event. The database has been changed, and a new table has been added for the return operation. As a junior programmer, there is no way. SQL has imported the Pinyin abbreviation scalar value function to support the special search in the Pinyin search interface. Forms can be minimized and dragged. For more details, please download this document to understand, using some special code, which is very helpful for junior programmers to understand programming.)