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32-Bit or 64-bit OS ??

, 19 Sep 2010
In C++ you can use the size of a pointer to work out what sort of process you're running in:bool is_64_bit(){ return sizeof(void *) == 8;}This has got the advantage of being portable and you don't have to call any OS functions.You can do something similar in C - just return...

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13 Oct 2010
Reinhard Ostermeier
In .NET 4.0, you can also use the new System.Environment.Is64BitOperatingSystem and System.Environment.Is64BitProcess
21 Sep 2010
GPUToaster™
5 alternatives  
A simple way to detect bitness of an OS Programatically. (C# and C++ examples given)
20 Sep 2010
a_pess
To check 64Bit Operating system in VB.NET,Public Shared Function is64BitOPeratinSystem() As Boolean Return (Marshal.SizeOf(IntPtr.Zero) = 8)End Function
5 Aug 2011
The_Mega_ZZTer
Version check is wrong. It happens to work correctly only because no minor versions of Windows 5 were released after 5.1 (AFAIK... are Windows Server 2003 and Embedded XP and Media Center XP still 5.1?). A theoretical version 5.2 would fail the check. I submit the following...

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Aescleal
Software Developer (Senior)
United Kingdom United Kingdom
I've been programming since 1985 - starting with Fortran 77, then moving onto assembler, C and C++ in about 1991. I also know enough Java and Python to read code but you probably wouldn't want me writing it.
 
I've worked in a wide variety of application areas - defense, banking, games and security with the longest stints being in security. I also seem to end up programming devices far too often.
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