Hi Daniel, On 03/13/17 21:53, Daniel Lehman wrote: > include/concrt.h | 25 ++++++++++++++++ The c-runtimes related headers are defined in include/msvcrt/*. In this case I think that it will be better to define needed constants in dlls/msvcrt/msvcrt.h because the concrt.h header is not useful. Thanks, Piotr