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串口通信程序，MSComm方式实现，有参考价值(Serial communication program, MSComm ways, have reference value)

串口调试助手的源码,自己编写，界面与当前流行的串口调试工具基本相同。该工具使用方便，而且可以自定义串口速率，由状态显示内容(serial debugging aids source, their preparation, interface with the popular serial debugging tools basically the same. The tool is easy to use, but can define serial rate, as indicated by the state)

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

使用VS2013的MFC编写的一个简单Modbus RTU的单命令控制Demo，能够实现继电器的开和关(A single command control demo of a simple Modbus RTU written in MFC of VS2013 enables relay opening and closing)

串口调试程序源代码，本例作为学习串口编程具有很好的参照作用。(Serial debugger source code, in this case as a learning serial programming with a good reference to the role.)

这个程序是利用VC编写的一个从机串口响应modbus查询命令程序，实现RTU方式，3.5和1.5个字符时间检测，CRC和LRC校验。(This program is written using VC as a response from the machine serial modbus query command procedure, to achieve RTU mode, 3.5 and 1.5 characters time detection, CRC and LRC check.)

把SerialPort通讯类封装成的DLL+使用例子(SerialPort Dll and demo)

一个功能比较全面的串口调试工具。你值得拥有。(A more comprehensive functional serial debugging tools. You deserve. )

vb 串口上位机 很简单的一个版本，大家自己扩展功能吧 (com executed on pc,it s a simple version ,easy for expansion)

说明：  BCB串口通讯源码示例程序。利用winapi函数，而非控件。(BCB examples of serial communication program source. Use WINAPI function, rather than control.)