Help convert a C++ header to D

[Arialis Majoris via Digitalmars-d-learn]

I have a rather large header file used to write plugins for 
reaper:

http://pastebin.com/Eebv1e0M
This file, unfortunately may change quite often depending on the 
version of reaper. Reaper automatically generates the C++ file. 
Is there a way to automatically convert this without too much 
trouble?

Thanks