通过VB编程实现与RS232串口进行通信，本资料为PDF格式。-By VB programming and RS232 serial communication, the data in PDF format.

VB程序，利用Agilent 34401A万用表测试电阻值，用Agilent visa编程通过RS232串口线控制34401A-The VB program, using Agilent 34401A multimeter resistance value, using Agilent visa programming by controlling the 34401A RS232 serial line

VB与RS232串行通信控制，能让你对RS232接口编程有更深入的了解，很难得的一本书。-VB and RS232 serial communication control, can let you have a better understanding on the RS232 interface programming, is very difficult to book.