为满足公司需求，我写了几个封装类，包括数据库常用操作封装、串口类的封装。-In order to meet company needs, I wrote several package categories, including the database used to operate package, serial type of package.

WinCE下面的串口类，可以实现串口接收，发送数据，（注意只是串口类文件。）-WinCE following serial class, you can implement serial port to receive and transmit data, (note that only the serial class file.)