llsyz的专栏

Mastering Microsoft Visual Basic 2010 Evangelos Petroutsose From the core of the language and user interface design to developing data-driven applications, this detailed book brings you thoroughly up to speed and features numerous example programs you can use to start building your own apps right away.

两个文件同步复制的软件 支持按间隔时间 可选择多个复制的方式来同步文件

可以在计算机上模拟PLC的运行,纠正编程当中的错误.