This is a great introduction to the difficult but important Microsoft standard DCOM. The authors Marshall Brian and William Rubin can show you everything you need to know to use DCOM without a lot of jargon or needless complexity. By just reading the book and following the examples, you could be able to write simple COM applications.
The articles presented here are adapted from the first few chapters in the book. The articles also contain down-loadable source code for easy to understand examples.