VS2012 C++ warning C4005: '__useHeader': macro redefinition

Question

While migrating an old C++ project from Visual Studio 6 up to Visual Studio 2012, we came across an odd set of warnings from inside the standard Microsoft platform headers:<

Answer 1

Although this answer is for VS10, it's of interest as might provide some clues as to what's going on viz the VC++ directories macros: The warning appeared when these statements were added in the header file of a project, MyApp:

#ifndef NTDDI_WINXPSP3
#define NTDDI_WINXPSP3 0x05010300
#endif 
#ifndef NTDDI_VISTA
#define NTDDI_VISTA 0x06000000
#endif 
#ifndef NTDDI_VISTASP1
#define NTDDI_VISTASP1 0x06000100
#endif 
#ifndef NTDDI_WS08
#define NTDDI_WS08 0x06000100
#endif 

Warnings like the following popped up for all but the XPSP3 def.:

Warning RC4005: 'NTDDI_VISTASP1' : redefinition C:\Program Files (x86)\Microsoft SDKs\Windows\v7.0A\include\sdkddkver.h.., MyApp

MyApp was a WinDebug 32 build, noting Windows7.1SDK appeared in the X64 section of the proj file:

Windows7.1SDK

The inherited value for Preprocessor Definitions was _VC80_UPGRADE=0x0600. Having used the SDK toolset prior to reverting to V100, the SDK libraries were found as inherited_from in Include directories and Library Directories in the VC++ Directories section, as noted here.
Looks like the warning is generated as a result of a combination of upgrading, migration, or toolset changes.

Edit: An unrelated issue in VS2017 (MBCS) is opting to use

LoadCursorW(nullptr, IDC_ARROW)

instead of the default LoadCursorA(...) in a WNDCLASSEXW structure. A possible solution is to redefine like so:

 #define IDC_ARROW           MAKEINTRESOURCEW(32512)

Here the warning can be suppressed by using the #undef procedure prior to the #define:

#ifdef IDC_ARROW
#undef IDC_ARROW
#endif
#define IDC_ARROW           MAKEINTRESOURCEW(32512)