to check

g_pNtDllInst->m_pfnRtlNtStatusToDosError = reinterpret_cast<PFN_RtlNtStatusToDosError >
                ( ::GetProcAddress(g_pNtDllInst->m_hDLLModule, "RtlNtStatusToDosError" ) );

perl resource

http://affy.blogspot.com/p5be/ch10.htm
http://affy.blogspot.com/p5be/ch12.htm
http://www.catonmat.net/download/perl.predefined.variables.pdf

To Check C++ howto

DWORD &JobResultStatus