[MinGW-dvlpr] WINVER and _WIN32_WINNT_ again

[Dimitri Papadopoulos-O. <pap...@us...>]

Hi,

I've searched on Google and everybody seems to agree on the macros that
need to be defined to target some Windows version.

By combining these, one finds that each of the targets is identified by
these respective macros (unless I'm wrong... in which case please
correct me):

	Windows 95            WINVER=0x400

	Windows 98            WINVER=0x400
	                      _WIN32_WINDOWS=0x0410

	Windows Me            WINVER=0x400
	                      _WIN32_WINDOWS=0x0490

	Windows NT 4.0        WINVER=0x0400
	                      _WIN32_WINNT=0x0400

	Windows NT 4.0 SP3    WINVER=0x0400
	                      _WIN32_WINNT=0x0403

	Windows 2000          WINVER=0x500
	                      _WIN32_WINNT=0x0500

	Windows XP            WINVER=0x501
	                      _WIN32_WINNT=0x0501

	Windows Server 2003   WINVER=0x502
	                      _WIN32_WINNT=0x0502

This implies that to distinguish between these groups
	Windows XP
	Windows 2000
	Windows NT 4.0
	Windows 95/98/Me
one needs to check _WIN32_WINNT only.

In order to distinguish between these groups
	Windows 95
	Windows 98
	Windows Me
one needs to check _WIN32_WINDOWS only.

So indeed it seems WINVER is not needed. Even Microsoft recommend
using _WIN32_WINNT and _WIN32_WINDOWS:
http://msdn.microsoft.com/library/en-us/sdkintro/sdkintro/using_the_sdk_headers.asp
although they sometimes use WINVER:
http://msdn.microsoft.com/library/en-us/sdkintro/sdkintro/compiling_source_files.asp

There are exceptions though. It's easier to understand
	#if (WINVER < 0x0500)
than
	#if !(_WIN32_WINNT >= 0x0500)

--
Dimitri