Apple used to provide a COM-based SDK for iTunes on Windows. This could be found via https://developer.apple.com/downloads/ and a search for
iTunes COM. It appears as if the download has been removed.
The API hasn't been updated in years, so pulling it from the download section makes sense.
Is there any official communication from Apple, that the iTunes COM API has been discontinued?
Apple started distributing iTunes via the Microsoft App Store. It seems that the version distributed there does not allow COM communication at all, because of sandboxing. An official confirmation would be appreciated.