RE: VS 2005 run on AMD Opteron (64 bits)

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Hi,
I understand that you had two questions:
1. Can VS2005 run on x64 platform?
2. Can VS2005 generate both 32 bit application and 64 bit application on
x64 platform?
If I have misunderstood, please let me know.

For your first question, yes, though VS2005 is a 32 bit application, it can
run on x64 platform if you select the 64 bit versions of components during
the installation.

For your second question, yes, VS2005 can generate both 32 bit application
and 64 bit application on both x86 and x64 platforms. By default, VS2005
build applications with 32 bit. To build your applicaion with x64, you can
configure your VS2005 as following:
Click the Debug dropdownlist, select "Configuration Manager...", select
<New...> in the "Active solution configuration" list, click <New...>; in
the "New Solution Configuration" window, input a name (eg. DebugX64) into
the "Name" field, select Debug or Release in the "Copy Settings from" list,
click OK; select <New...> in the "Active solution platform", select x64 in
the "Type or select the new platform", select "Win32" in the "Copy settings
from' list.

For debugging, it is recommended that you use 64 bit remote debugger to
debug your application. The Visual Studio 2005 debugger allows you to debug
64-bit applications on a local or remote computer. When debugging on a
local computer, Visual Studio is running under WOW64, while the application
is running on Window 64-bit. Essentially the local debugging is remote
debugging, since VS2005 uses remote debugging to connect between WOW64 and
the 64 bit application on the same machine.

Also, you may want the following references:
Installing Visual Studio 64-bit Components
http://msdn2.microsoft.com/en-us/library/ms246588(VS.80).aspx
How to: Debug 64-Bit Applications
http://msdn2.microsoft.com/en-US/library/ms184681(VS.80).aspx
Visual Studio 2005 Remote Debugging
http://msdn2.microsoft.com/en-us/netframework/aa569599.aspx

Hope this helps. If you have any other questions or concerns, please feel
free to let me know.

Best regards,
Charles Wang
Microsoft Online Community Support
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