i’ve found that juce is pretty nice about letting you add other things. apart from the tricksy including of windows headers (which is easy to get around when you know how to do it), it’s pretty easy.
i would create a nice juce-like class that gives you an easy interface to access the things you’d want to use, and then use whatever platform functions you need in the implementation file. That’s how I did my joystick classes - they just use windows functions in the implementation but wrap them in a nice class that you could imagine was in juce all along. the tricky part is learning the functions you need to use in your definitions!
this site may help