https://issues.dlang.org/show_bug.cgi?id=19051
--- Comment #6 from Rainer Schuetze <r.sagita...@gmx.de> --- The definitions of core.sys.windows don't go beyond Windows Vista, and I suspect these are mostly covered by the current libraries. If you want to go further, I recommend using the Windows SDK directly. Visual D has a conversion tool to convert a bunch of headers to D: https://github.com/dlang/visuald/blob/master/c2d/idl2d.d --