几个类，按钮上贴图，读取配置文件，还有类似QQ的那种点击打开，再点击闭合的操作的类 -A few classes, the button on the map, read the configuration file, as well as a similar kind of QQ click Open, and then click on the operation of closed classes

VB 实现串口收发字符串，保存文件等操作。-VB serial transceivers string, save the file operation.

File open, write operation source()