What exactly is a com object, and how do I use it?

What exactly is a com ob开发者_开发技巧ject, and how do I use it?

The essence of COM is a language-neutral way of implementing objects that can be used in environments different from the one in which they were created, even across machine boundaries. For well-authored components, COM allows reuse of objects with no knowledge of their internal implementation, as it forces component implementers to provide well-defined interfaces that are separate from the implementation

More details you can check out on WIKI