This is great, but to merge this into JNA you need to do a few things.

• write tests that exercise each new API in some way - Win32 has almost full test coverage that was added over the last couple of years
• for your question on structures - the rule of thumb is that the function goes into a file called the same as the DLL name and the defines go into the same as the header file. In the case of setupapi it's the same, but in the case of Kernel32 functions it's not (there's no kernel32.h in the SDK), so defines like RDW_INVALIDATE are in the wrong place, they should be in WinUser.java (as in WinUser.h) while the function IsWindowVisible in User32.java (as in User32.dll) - you have to move quite a bit of things around, sorry
• edit CHANGES.md
• try to fix the merge diff, the problem is tabs vs. spaces i think, it should be 2 spaces or something like that

Thanks for the feedback. I'll look in to making those changes in the next few weeks.

Cheers,

Luke

I am merging the changes, thank you. Please see my comments for a future pull and update Changes.md in the root.

Thanks for merging in this pull request and for the feedback.

Updating Changes.md is still on my to-do list. Also I think next time I'll make my pull request smaller!

Cheers, Luke

Cool, thanks Luke. My comments are minor, it takes some time to get used to this stuff. You're doing great. Congrats for your first commit to JNA! Billions of people use it :)