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一个非常完整的川口通讯源程序，我费了很大功夫才把他找到。(a very complete source Kawaguchi communications, I spent a lot of time and energy only to find him.)

说明：  Wincc使用MSComm控件串口通讯，VB中发送十六进制数据(Wincc uses MSComm control to communicate through serial port and sends hexadecimal data in VB)

串口通讯测试代码，经过测试，可以成功运行。(Serial Communication Test.)

串口调试，串口设备模拟，支持32/64位系统。(Serial debugging, serial device simulation)

控件 进行串口通信，采用微软的控件控件 进行串口通信，采用微软的控件(Controls the serial communication, using Microsoft' s control controls the serial communication, using Microsoft' s control)

这是串口调试助手，可以显示，并带有图像显示(This is a serial debugging assistant, you can display, and with image display)

说明：  很多下位机程序员都有这样的经历，在交付工程的时候对方要求提供源程序，而大多数下位机程序员都知道交出源程序是意味着什么，所以为了保护各位下位机程序员的合法利益.这个工具，伪装过后的源程序可以编译通过。(many lower computer programmers have the same experience that the delivery of the other works on the request source, and most of the next crew to surrender programmers are aware of what it means to the source, Therefore, in order to protect you and lower computer programmer's legitimate interests. this tool, camouflage after the source compile.)

用C#语言编写串口通信程序详解，有代码有步骤(c#Serial programming steps detailed)

基于Visual C++串口与下位机通信(Based on Visual C++ serial PC program to communicate with the microcontroller)

十六进制向十进制转化的程序，可用于串口通讯编程。(Hexadecimal to decimal conversion program can be used for serial communication program.)