比较全的VC++串口通信开发教程，从实践的角度详细介绍了Windows环境下和DOS环境下的串口通信的基本方法，并有实例演示。-Comparison of the whole of the VC++ Serial Communication Development Tutorial, from the perspective of the practice described in detail under the Windows environment and the DOS environment of the basic method of serial communication, and examples of presentation.