wince下使用vc编写的对串口读写的小程序，调用底层api对串口进行操作，自己可以设置波特率等参数，并将读到数据进行现实-wince use vc prepared to read and write to the serial port of small programs, call the bottom of the serial api operate, they can set the baud rate and other parameters, and read data from