Hi PodMaster thanks for the hints. I have come to the conclusion that XS, Win32, CL.EXE + C++ is a bad combination. With C things can generally be made work but C++. Aargh. While it is easy to build this SDK from within Visual studio as soon as you get out side it and want to do stuff off the command line all sorts of issues start arrising. All due to unresolved externals. I finally got sick of it when I hit an unresolved externals bug related to this MS compiler SNAFU. I don't need it to compile on Win32. I can compile on Linux so time to be practical.