Detect whether current Windows version is 32 bit or 64 bit

Question

Believe it or not, my installer is so old that it doesn\'t have an option to detect the 64-bit version of Windows.

Is there a Windows DLL call or (even better) an en

Answer 1

If you can make API calls, try using GetProcAddress / GetModuleHandle to check for the existence of IsWow64Process which is only present in Windows OS that have 64-bit versions.

You could also try the ProgramFiles(x86) environment variable used in Vista/2008 for backwards compatibility, but I'm not 100% sure about XP-64 or 2003-64.

Good luck!