Board index » Windows Vista » values for Windows version (dwMajorVersion, wServicePackMajor stuff)

Windows Vista8
i am working with these,



dwMajorVersion

dwMinorVersion

dwBuildNumber

dwPlatformId

wServicePackMajor

wServicePackMinor



1) So, dwMinorVersion (1) could only be Windows XP and dwMajorVersion

(6) could only be Windows Vista or Windows Server



2008?



2) So, if I had dwMinorVersion (1) and wServicePackMajor (1) that

could only be Windows XP SP1?



3) So, if I had dwMinorVersion (1) and wServicePackMajor (2) that

could only be Windows XP SP2?



4) Would dwMajorVersion (6) and wServicePackMajor (1) be possible?



Thank you. I am hoping these scattered questions will help me

understand this.



Crystal


-

<crystal160@gmail.com>wrote ...

Hi Crystal,



It sounds like a trick question :-). You're saying, in effect: "I want to

examine a subset of my OSVERSIONINFOEX struct, and extrapolate the value of

other OSVERSIONINFOEX fields based on this subset". That's always going to

be risky programming: basically, it's trying to conjure information out of

thin air.



I suspect that dwMajorVersion (6) and wServicePackMajor (1) will certainly

be possible and common, once Service Pack 1 for Vista has been released.



dwMinorVersion (1) and wServicePackMajor (1) could easily prove to be an

as-yet unnanounced version of Windows like Vista R2 SP1, or similar -

there's no gurantee it will always be limited to Windows XP SP1.



Likewise, dwMinorVersion (1) and wServicePackMajor (2) may end up equalling

both XP SP2 *and* Windows Server 2008 R2, SP2. We just don't know.



We already saw huge bugs in 3rd party applications for Windows 3.1, which

did:



if (MinorVersion < 10) {

Error("This program requires Windows 3.1");

}

Windows 95 required a special comptibility fix to let all these programs

run. The programs had no technical incompatibility with Windows 95; but they

refused to run because of their broken MinorVersion check. Meanwhile, users

blasted Microsoft for "breaking compatibility".



So, my question for you is: how are you getting these dwMajorVersion, etc

values? I'm assuming that you are calling GetVersionEx() or

VerifyVersionInfo(). If you call weither of thee functions you will get a

fully populated OSVERSIONINFOEX struct. This gives you all the information

you need to determine the exact version of Windows - even versions which

don't exist yet. So, what are you trying to achieve, by manipulating a

subset of this information? What resource are you trying to conserve, while

making you application more fragile and error prove in its version checking?



--

Andrew McLaren

amclar (at) optusnet dot com dot au





-

Very Interesting! I think see what you mean....



I am indeed using GetVersionEx() to get the fully populated

OSVERSIONINFOEX.



So, based on this data, how can I pluck it to come to the conclusion I

am dealing with, 1) a Windows XP version less than Windows XP2, and 2)

a Windows Vista machine? I want to limit constraints to 1 & 2, so...

like server editions, Windows 2003 or whatnot should be ignored/not

identified. :) :) Can that be done?



Crystal



-

Of course! :-) The trick is that you must *never* make decisions based on

dwMinorVersion alone, without an explicit dwMajorVersion context for it.

Generally, you'd want to use dwMajorVersion and dwMinorVersion togther, to

make sure the version context is clear:



if ( osvi.dwMajorVersion == 6 && osvi.dwMinorVersion == 1 )

printf ("Gee, it must be Vista Service Pack 1!");



if ( osvi.dwMajorVersion == 6 && osvi.dwMinorVersion == 0 )

{

if( osvi.wProductType == VER_NT_WORKSTATION )

printf ("It is Windows Vista");

else printf ("It is Windows Server 2008" );

}



if ( osvi.dwMajorVersion == 5 && osvi.dwMinorVersion == 1 )

printf ("It is Microsoft Windows XP ");



if ( osvi.dwMajorVersion == 5 && osvi.dwMinorVersion == 0 )

printf ("It is Microsoft Windows 2000 ");



There are many code samples in MSDN, see here for a good starting point:

msdn2.microsoft.com/en-us/library/ms724429.aspx" >msdn2.microsoft.com/en-us/library/ms724429.aspx



Hope it helps,

--

Andrew McLaren

amclar (at) optusnet dot com dot au





-

Ah! Very good and I do believe I have a clear understanding.



Just to verify, within the subset of Windows XP, am I right in my

logic below? :)



if ( osvi.dwMajorVersion == 5 && osvi.dwMinorVersion == 1 )

printf ("It is Microsoft Windows XP Home or Professional

SP1");



if ( osvi.dwMajorVersion == 5 && osvi.dwMinorVersion == 2 )

printf ("It is Microsoft Windows XP Home or Professional

SP2");



-

<crystal160@gmail.com>wrote ...



No! No, no, no. That code will give you the wrong results.



(dwMajorVersion == 5 && dwMinorVersion == 1) includes *all* releases of

32-bit XP; including RTM, SP1, SP2; and SP3 when it finally ships.



(dwMajorVersion == 5 && dwMinorVersion == 2) is Windows Server 2003 R2,

Server 2003, or XP x64.



dwMinorVersion does not give you any information about Service Pack level.

It indicates the minor version, that is all. The Service Pack version is

indicated by wServicePackMajor and wServicePackMinor.



Did you look at the code sample in the URL I sent you? -

msdn2.microsoft.com/en-us/library/ms724429.aspx" >msdn2.microsoft.com/en-us/library/ms724429.aspx



Everything you need to know, is there.



if ( osvi.dwMajorVersion == 5 && osvi.dwMinorVersion == 1 )

{

printf ("It is Microsoft Windows XP Home or Professional ");

{

if ( osvi.wServicePackMajor == 0 )

printf ("with no Service Pack");

else if ( osvi.wServicePackMajor == 1 )

printf ("with Service Pack 1");

else if ( osvi.wServicePackMajor == 2 )

printf ("with Service Pack 2");

else printf ("unrecognised Service Pack");

}

}



You need to read and understand the MSDN documentation. That is more

reliable, than trusting random fools in newsgroups:

msdn2.microsoft.com/en-us/library/ms724833.aspx" >msdn2.microsoft.com/en-us/library/ms724833.aspx



--

Andrew McLaren

amclar (at) optusnet dot com dot au





-

L0L, you don't seem like one :D



Finally, I want to ask,



please look at this:



if ( osvi.dwMajorVersion == 6 && osvi.dwMinorVersion == 1 )

printf ("Gee, it must be Vista Service Pack 1!");



Can one determine Windows Vista service pack releases the same way as

calculated with Windows XP?



so, like



if ( osvi.dwMajorVersion == 6 && osvi.dwMinorVersion == 1 )

{

printf ("It is Microsoft Windows Vista All Versions");

{

if ( osvi.wServicePackMajor == 0 )

printf ("with no Service Pack");

else if ( osvi.wServicePackMajor == 1 )

printf ("with Service Pack 1");

else if ( osvi.wServicePackMajor == 2 )

printf ("with Service Pack 2");

else if ( osvi.wServicePackMajor == 3 )

printf ("with Service Pack 3");

else if ( osvi.wServicePackMajor == 4 )

printf ("with Service Pack 4");

else printf ("unrecognised Service Pack");

}

}



It is slightly exaggerated, but will it work? I noted you have this:



if ( osvi.dwMajorVersion == 6 && osvi.dwMinorVersion == 0 )

{

if( osvi.wProductType == VER_NT_WORKSTATION )

printf ("It is Windows Vista");

else printf ("It is Windows Server 2008" );

}



Is above just an alternative way to get to the same information? :D









-

On Sep 5, 9:25 pm, purposegr...@gmail.com wrote:

i hope this different view is satisfactory -- no?



-

Is there some specific technical question you are not clear about? Or are

you just looking for general confirmation?



Everything you need to know about GetVersionEx() is in the MSDN URLs I gave

you. If the answer is not obvious from those links, read them again; repeat,

until the answer is obvious.



I can answer questions forever; but eventually you need exercise your own

analytical powers.



--

Andrew McLaren

amclar (at) optusnet dot com dot au





-

No worries Andrew, thank you for your time and I appreciate it. I am

assuming you are singing off -- it is critical to me to get

confirmations, (like I was trained by a guy from Singapore -- who

always preached, 'trust, but re-confirm'". therefore, when there are

blank spaces, I try not to play word volleyball, just be polite and

understand sometimes conversationalists on-balance sometimes one

wishes.



-

Cool. If I thought you really needed further guidance to achieve

understanding, I'd happily give it to you. But I think you have all the

tools you need. Study the MSDN docs and look at the code samples in MSDN.

The rest is up to you.



You can also experiment with testing your code and verifying the behaviour.

If you install a tool like Virtual PC:

www.microsoft.com/windows/products/winfamily/virtualpc/default.mspx" >www.microsoft.com/windows/products/winfamily/virtualpc/default.mspx

you can have XP, XP SP1, XP SP2, Server 2003 and Vista, all running on the

one machine at the same time. This will make it easier to test your

application and/or explore the behaviour of APIs, on different versions of

Windows.



If you get stuck on a specific technical question regarding the

OSVERSIONINFOEX struct, try asking on microsoft.public.win32.programmer.ui.

GetVersionEx() and related functions aren't "UI" as such, but that is

probably the closest appropriate group.



BTW here's a fairly good article I just noticed while browsing CodeGuru:

www.codeguru.com/cpp/w-p/system/systeminformation/article.php/c8973__1/" >www.codeguru.com/cpp/w-p/system/systeminformation/article.php/c8973__1/

Marius covers the same ground as MSDN but in a more narrative, digestible

style. Besides, I like Romanian programmers :-)



Good luck with the project!

--

Andrew McLaren

amclar (at) optusnet dot com dot au





-

I am actually very poor (no kidding), ... I do not have vista, but can

you confirm yay or nay if the last code blob was correct, or is it

just simply not documented or clear as of yet? thank you for the

right push :D :D have a fabulous day!!



thank you for the encouragement, I am working hard on it. I'll

definitely want to re-test it, and confirm, but it's nice to know

someone who is fully digested in the material to give grace to what is.



-

<crystal160@gmail.com>wrote in message

Download the 30 day Eval Vista VHD and run it in Virtual PC. Both Virtual PC

and the Eval VHD are free (apart from cost of download). Thsi will give you

a chance to run your compiled code on Vista and verify the results (assuming

Vista is a target platform for your code):



www.microsoft.com/downloads/details.aspx&tm" >www.microsoft.com/downloads/details.aspx&tm



It is correct. Except, you said ....



It should be ...



if ( osvi.dwMajorVersion == 6 && osvi.dwMinorVersion == 0 )



Vista and Server 2008 are Windows 6.0.



Windows 6.1 hasn't been announced; we don't know what 6.1 will be, if

anything (next major release is expected to be Windows 7.0).



No. The code here is specifically querying wProductType, to determine the

Product Type. This is not an alternative path to any information contained

in the other OSVERSIONINFOEX fields - the fields are all orthogonal:



- dwMajorVersion tells you the Major Version of Windows. It does *not* tell

you anything about the Service Pack level or Product Type.



- wServicePackMajor tells you the major version of Service Pack. It does

*not* tell you anything about the major version of Windows or Product Type.



- ProductType tells you the Product Type. It does *not* tell you anything

about the Windows Version or Service Pack level.



- and so on ...



Seriously - the MSDN doco is very clear and straightforward here. Read it.

If you don't understand, read it again. If you still don't understand, read

it again. If you still don't understand, read it again. There are no

undocumented mysteries about GetVersionEx() or OSVERSIONINFOEX which you

cannot discover just by reading the MSDN doco. If you still don't

understand, read it again. If you still don't understand, read it again. If

you still don't understand, read it again.



Good luck,

--

Andrew McLaren

amclar (at) optusnet dot com dot au





-

Thank you. you have been most helpful, and accurate.



-