>Microsoft used to be roundly criticized for supposedly building private APIs into Windows that Microsoft Office was allowed to use either because they were und

>Microsoft used to be roundly criticized for supposedly building private APIs into Windows that Microsoft Office was allowed to use either because they were undocumented, or Office got the documentation far ahead of anyone else. At the same time though, Microsoft wasn't preventing other developers from using those hidden APIs (if they could find them) nor preventing them from publishing their own competing apps. Sure, Microsoft's behaviour at the time was anti-competitive and sometimes even predatory, but they were never so on Windows to the extent that Apple is today on iOS.