详细介绍了在Windows环境下应用VC++实现PC机与单片机的几种串行通信方法，给出了用Visual C++6.0编写的PC机程序和用C51编写的单片机通信程序。经实际应用系统运行稳定可靠。-detail in the Windows environment applications VC PC and SCM several serial communication method, we use Visual C 6.0 prepared by the PC and procedures used to prepare the C51 microcontroller communication program. By actual application system running stable and reliable.