Samba and Wine were both created using reverse engineering. Microsoft frequently made changes that broke both products. Don't get me started on Microsoft's PPTP and Kerberos. - Nvidia produced their own closed drivers on Linux. How does that involve Microsoft?

You agree with me then! that was my point. You can't reverse engineer Google Search, you can't connect with it in an unlimited way (except using web scraping techniques or using the restricted local search API). With Microsoft you can reverse engineer it.

And I have an story to tell: my company started selling a full API for a Microsoft product without one. Not only we reverse engineered the product but we built a complete API on top. One day Microsoft QA call us if they can help to test the compatibility of our product in operating systems under development.