Visual Basic6.0 监视RS232串口数字输出状态的例子-Visual Basic 6.0 surveillance RS232 serial digital output state example

串口调试工具，在Visual Basic6.0中实现-Serial port debugging tool, implemented in Visual Basic6.0

一本详细讲解基于visual basic6.0平台下的串口程序开发的书籍，里面有大量的开发实例-An elaborate visual basic6.0 platform based on the serial port application development books, there are a large number of development examples