Determine if OS is x64 or 32bits?

[tchinla]

Hi,

I can determine that my OS is:

"Microsoft Windows NT 5.2.3790 Service Pack 1"

via calls to OperatingSystem(pID, ver) and BuildOperatingSystemObjects()

Now, I have 2 Windows 2003 Enterprise servers, one is x32 and one is x64.
They both return the same above OS information. How through code, can I
determine if the OS is 32bit or 64bit?

Thanks.

[Nicholas Paldino [.NET/C# MVP]]

tchinla,

A dirty way to do it would be to check the static Size property on the
IntPtr class. It will be 32 for 32-bit machines, and 64 for 64-bit
machines.

Hope this helps.

--
- Nicholas Paldino [.NET/C# MVP]
- mv*@spam.guard.caspershouse.com

"tchinla" <tc*****@discussions.microsoft.comwrote in message
news:FF**********************************@microsof t.com...

Hi,

I can determine that my OS is:

"Microsoft Windows NT 5.2.3790 Service Pack 1"

via calls to OperatingSystem(pID, ver) and BuildOperatingSystemObjects()

Now, I have 2 Windows 2003 Enterprise servers, one is x32 and one is x64.
They both return the same above OS information. How through code, can I
determine if the OS is 32bit or 64bit?

Thanks.

[Willy Denoyette [MVP]]

"Nicholas Paldino [.NET/C# MVP]" <mv*@spam.guard.caspershouse.comwrote in
message news:ew**************@TK2MSFTNGP05.phx.gbl...
| tchinla,
|
| A dirty way to do it would be to check the static Size property on the
| IntPtr class. It will be 32 for 32-bit machines, and 64 for 64-bit
| machines.
|

Not exactly, it will be 32 for 32 Bit applictions running on 32 and 64 bit
machines (whetever OS version), only when it's 64 you are sure running a 64
bit OS.

Willy.

[Martin Carpella]

"Nicholas Paldino [.NET/C# MVP]" <mv*@spam.guard.caspershouse.comwrites:

A dirty way to do it would be to check the static Size property on the
IntPtr class. It will be 32 for 32-bit machines, and 64 for 64-bit
machines.

Can you suggest any "non-dirty" way to achieve this? I just thought that
checking IntPtr.Size is the suggested way, as this even documented
behaviour.

Best regards,
Martin

[Chris Mullins]

"tchinla" <tc*****@discussions.microsoft.comwrote

Now, I have 2 Windows 2003 Enterprise servers, one is x32 and one is x64.
They both return the same above OS information. How through code, can I
determine if the OS is 32bit or 64bit?

As far as I know, the best way to do this is through WMI.

Doug Holland (one of the C# MVP's) did this recently using the WMI Code
Creator. A bit more detail can be found on his blog:
http://msmvps.com/blogs/cdistilled/a...29/110760.aspx

--
Chris Mullins, MCSD.NET, MCPD:Enterprise
http://www.coversant.net/blogs/cmullins