how to detect OS architecture?

[Hugo Florentino]

On Tue, 17 Dec 2013 13:21:30 -0000, Regan Heath wrote:
> Is GetNativeSystemInfo your other solution?  On the MSDN page for
> GetNativeSystemInfo it recommends using IsWow64Process to detect if
> you're  running under WOW64, at which point you would then call
> GetNativeSystemInfo.
>
> I am not sure what GetNativeSystemInfo does if called from a 32 bit
> exe on  a 32 bit OS..

It seems to work. After all it makes sense, the native system is 
actually 32 bits.

> I /know/ that the code in std.internal.windows.advapi32 which
> dynamically  loads and calls IsWow64Process will work, because we use
> it here at work  for this very purpose.  It's also the simplest most
> direct way to answer  this specific question and it's already 
> present,
> tested and working in  phobos .. so I would be inclined to use it, in
> preference over  GetNativeSystemInfo.
>
> R

If after using IsWOW64Process a GetNativeSystemInfo must still be 
issued like you mentioned earlier, I don't see the advantage over 
calling that function directly in the first place.
Or am I missing something?