在用计算机进行数据传输时，常用的是串行通信方式。在 Visual C＋＋的编程中，既可以用 Windows API函数进行串行通信编程，也可以利用环境自带的控件进行编程。利用 API函数编写实际应用程序时，往往要考虑多线程的问题，这样编出来的程序不但十分庞大，而且结构比较复杂，继承性差，维护困难。但是使用串行通信控件就 相对简单一些，而且功能强大，性能安全可靠。 -The use of computer data transmission, the commonly used is the serial communication. In Visual C　　 programming in both Windows API function can be used for serial communication programming, can also bring their own use of environmental control program. Use API function to prepare the actual application, often have to consider the issue of multi-threaded, so that the procedure not only made out of very large and are structurally more complex inheritance poor maintenance. However, the use of serial communication control on a number of relatively simple, but powerful, safe and reliable performance.