继承自COM类(Inheriting from a COM class)

 我在Visual Studio 2005中使用纯粹的非托管项目（C ++）。 我有一个来自第三方的COM类，在OCX文件中。 这个类是一个控件（“小部件”）。 我一直在通过使用Typelib向导的Add Class生成的IDispatch包装类来使用它。 
 
 我想以几种方式扩展这个类，公共继承比合成更实用（我希望派生对象公开父类所做的每一个方法）。 派生类也应该可用作COM组件。 
 
 我可以这样做吗？ 如果是积极的，我该如何做到这一点？ 

I'm working in Visual Studio 2005 with a pure unmanaged project (C++). I have a COM class, from a third party, in a OCX file. This class is a control ("widget"). I've been using it through a IDispatch wrapper class generated using the Add Class from Typelib Wizard.
 
I would like to extend this class in a few ways and public inheritance would be way more practical than compositing (I want the derived object to expose every single method that the parent class does). The derived class should also be available as a COM component.
 
Can I do this? If positive, how can I accomplish this?

原文：https://stackoverflow.com/questions/6903646