CODEWITHSUNDEEP
c++winapiwindows-10kernel32
RanH
RanH

Reputation: 852

Why does GetFileVersionInfo on kernel32.dll in Windows 10 return version 6.2?

I am trying to retrieve kernel32.dll version in order to perform a Windows version check. Yet, for some reason, even though kernel32.dll's version (as seen in file properties) is 10.0.10586.0, the returned version is: 6.2.10586.0 how come?

    DWORD dwDummy;
    DWORD dwFVISize = GetFileVersionInfoSize(lpszFilePath, &dwDummy);
    LPBYTE lpVersionInfo = new BYTE[dwFVISize];
    if (GetFileVersionInfo(lpszFilePath, 0, dwFVISize, lpVersionInfo) == 0)
    {
        return FALSE;
    }

    UINT uLen;
    VS_FIXEDFILEINFO *lpFfi;
    BOOL bVer = VerQueryValue(lpVersionInfo, L"\\", (LPVOID *)&lpFfi, &uLen);

    if (!bVer || uLen == 0)
    {
        return FALSE;
    }
    DWORD dwFileVersionMS = lpFfi->dwFileVersionMS;
    DWORD dwFileVersionLS = lpFfi->dwFileVersionLS;
    delete[] lpVersionInfo;

    DWORD dwLeftMost = HIWORD(dwFileVersionMS);
    DWORD dwSecondLeft = LOWORD(dwFileVersionMS);
    DWORD dwSecondRight = HIWORD(dwFileVersionLS);
    DWORD dwRightMost = LOWORD(dwFileVersionLS);

Kernel32.dll properties (same as in SysWow64): enter image description here

Upvotes: 4

Views: 4754

Answers (2)

David Heffernan
David Heffernan

Reputation: 612794

You are reading the wrong fields from the version information for this task. Instead of dwFileVersionMS and dwFileVersionLS use dwProductVersionMS and dwProductVersionLS.

The file version fields are subject to supportedOS compatibility issues. That is their values depend on the supportedOS levels declared in your application manifest. On the other hand the product version fields do not depend on the manifest.

Upvotes: 7

RbMm
RbMm

Reputation: 33706

Applications not manifested for Windows 8.1 or Windows 10 will return the Windows 8 OS version value (6.2).

this is from GetVersionEx function MSDN description. for GetFileVersionInfo no such note, but really this doing same. i look under debugger: enter image description here

enter image description here

so 10.0 ( 0xA000) in dwFileVersionMS can be fixed to 6.2 or 6.3 but dwProductVersionMS - not changed (0xA000 ~ 10.0) think need fix MSDN documentation for GetFileVersionInfo[Ex] :)

Upvotes: 6

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