[Dev-C++] ANSI C++ forbids declaration 'ULONG' with no type in mapi.h

[Sistemas O. S.A. <or...@ra...>]

Hello,

I'm trying to compile an application which uses the mapi.h library. I get 
the next error message:
ANSI C++ forbids declaration 'ULONG' with no type.  It's on the line 133 of 
mapi.h
Is it a bug, or do I need to change a compiler option?

Thanks,
Jorge Elizondo,
Sistemas Ordo, S.A.