how to detect x64 vs. x86?

[Richmond]

On 27/09/12 10:05, Phil Davis wrote:
> I know this has been discussed before, but my search reveals nothing. 
> So I ask.
>
> On Windows, is there a variable / shell command / registry entry my 
> app can look at to see whether the OS is 32- or 64-bit? It would be 
> nice if you could do it the same way across Vista, 7, 8; but I'll 
> settle for what exists.

It would be nice, regardless of the operating system.

AND, ideally something within Livecode that is cross-platform.

>
> Thanks so much!
>