Why can't VC9 compile for NT4? | Tech Off

Dodo
I'm your creativity creator™ :)

I'm doing the following:

<BR>#include <windows.h><BR>#define _WIN32_WINNT 0x0400

This will however always result in this:

sourcefile(line) : warning C4005: '_WIN32_WINNT' : macro redefinition
        c:\program files\microsoft sdks\windows\v6.0a\include\sdkddkver.h(151) : see previous definition of '_WIN32_WINNT'

It's only defined once. How do I fix this without setting _WIN32_WINNT to 0x0501?

CannotResolveSymbol
{insert caption here}

C preprocessor directives are processed in the order they are found in the source file, so you need to define _WIN32_WINNT before you include <windows.h> or it won't affect anything in windows.h. Windows.h defines a default value for _WIN32_WINNT if you don't specify a value before including it.

Take a look at stdafx.h and targetver.h in the default Win32 project template (what you get if you don't specify "Empty Project" in the wizard) for an example.

Dodo
I'm your creativity creator™ :)

In reply to CannotResolveSymbol

#Apr 20th @ 3:39 PM

I already did that, though it's still moaning around and I want to stop it. I don't like editing the Windows SDK, it might break things with other stuff. The application works but those warnings kinda give me chills.

Sven Groot
My name has 9 letters. Coincidence? I think not...

In reply to Dodo

#Apr 20th @ 5:05 PM

I just tried:

#define _WIN32_WINNT 0x0400<BR>#include <windows.h>

And it worked fine in VC9. So what's your problem?

AndyC

I believe the SDK that ships with VS9 doesn't officially support Windows prior to 2000, so even if you manually define the NT4 target there is no guarantee that it will work. You'd need to install and configure an older SDK version to guarantee NT4 targetting, but then that's probably not guaranted to work in VS9.