This project is a console application using the static version of the allstat library. When building the allstat library, macros are overridden using SolutionDefines.targets. Thus, when the application is statically linked, only the data of the specified error types gets into it: Win32 errors and errno
SolutionDefines.targets is included to allstat\AllStat\allstat.vcproj. If SolutionDefines.targets is present in the root directory of a solution, it will be included and used at allstat library build. You can use PreprocessorDefinitions item of SolutionDefines.targets to override default values of macros used by allstat (see Custom Build in readme.md of allstat to get list of supported macros).