I do believe Microsoft offered Mektek a deal for them to get their hands on the source code but at the cost of everything mektek made/implemented ect would be the property of M$, naturally Mektek said no deal.
But then again a few things have changed since then and its possible that they got access to the source code through their own ingenuity(they figured out some or parts of it?).
To be honest its just speculation and peeing into the wind really, it doesnt matter really how they managed to implement the features they have , what matters is that they have actually done these things!