基于VC的串口操作类。在vc环境下串口设备被当作文件读写，该类文件较好的封装了各种操作接口，方便上位机与下位机通讯。- Class-based VC serial operation. Vc environment is treated as file read and write serial devices, such documents better encapsulates various user interface, easy PC machine communication a

一个串口通讯类,用来对串口进行控制用于银行目卡读取()