Re: determine, using an API, whether Vista is 32 bit or 64 bit
"shaji" <shajiparemmal@gmail.com> wrote in message
news:1161171807.471130.113610@h48g2000cwc.googlegroups.com...
Cool. Thats pretty straight forward.
Thanks a lot, Jochen.
Hmmm, maybe not so fool-proof though. For native 32-bit exes it will work
like you think.
For managed code (.NET, Java, or any other such), it will return false
regardless, because Vista 32 will use a 32-bit managed host, so not WoW, and
Vista 64 will use a 64-bit managed host, which is also not WoW. Under .NET
I think you could use Marshal.SizeOf(typeof(IntPtr)) to differentiate. This
also applies to code which has been recompiled for the target system.
In general, probably check sizeof (void*) first, and if that says your app
is 32-bit, check IsWow64Process.
Jochen Kalmbach [MVP] wrote:
Hi shaji!
Could anybody tell me how to determine, using API or APIs, whether my
Windows vista OS is 32 bit or 64 bit?
IsWow64Process
http://msdn.microsoft.com/library/en-us/dllproc/base/iswow64process.asp
Greetings
Jochen
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