In addition modem industrial control is not a close system again, ActiveX is a name of trade mark based on visual controlling part structure of COM. It offers one way of encapsulation of COM, and a kind of method to input it to application program.

• 另外现代的工业控制不再是封闭的系统,ActiveX是基于COM的可视化控件结构的商标名称,提供了封装COM组件并将其置入应用程序的一种方法。