Win32多线程串口性能测试程序，能够同时测试多个串口并检测到出错。其中使用到其他开源代码，具体请看代码文件开头的版权声明-Win32 serial performance multi-threaded test program, can test multiple serial ports and detect the error.

该代码实现串口传输功能，性能稳定。已经过实际测试。开发者可以适当的作为参考资料，提高开发效率。-The code serial transmission function, stable performance. It has been the actual test. Developers can appropriate as a reference to improve development efficiency.