How to inherit CNiGraph class?

[starpower]

I create a new class inheriting from CNiGraph class, and add codes which display a popup menu when OnRButtonDown event occurs in the new class. However, all menu items are grayed, and cannot be changed using MF_ENABLED flag.

If I create a new class inheriting from CButton class and repeat the same process, the menu is enabled. Or if I directly respond to OnRButtonDown event of CNiGraph class, everything is ok as well.

So, how to inherit a class in Measurement Studio?

[ieyhli]

请问你的邮箱或msn是什么？我现在正在做这方面的东西，想与你请教一些问题。首先，为什么我从vc里拖过来的graph类叫cwgraph,而这里还有其他一些资料上都叫CNiGraph？谢谢？

[starpower]

Graph控件的类叫做CNiGraph，如果你在VC中拖入了一个Graph，MS会自动给这个对象起名CWGRAPH~。

我的邮箱是xingzhang@gmail.com。刚接触MS不久，有什么问题可以一起讨论