Получение версии Windows

void getRealWindowsVersion(HWND hDlg, UINT message, WPARAM wParam, LPARAM lParam) {
 
    RTL_OSVERSIONINFOEXW *pk_OSVer = new RTL_OSVERSIONINFOEXW;
    typedef LONG(WINAPI* tRtlGetVersion)(RTL_OSVERSIONINFOEXW*);
 
    memset(pk_OSVer, 0, sizeof(RTL_OSVERSIONINFOEXW));
    pk_OSVer->dwOSVersionInfoSize = sizeof(RTL_OSVERSIONINFOEXW);
 
    HMODULE h_NtDll = GetModuleHandleW(L"ntdll.dll");
    tRtlGetVersion f_RtlGetVersion = (tRtlGetVersion)GetProcAddress(h_NtDll, "RtlGetVersion");
 
    LONG Status = f_RtlGetVersion(pk_OSVer);
    
    if (Status == 0) {
        TCHAR version = TCHAR("Windows") + pk_OSVer->dwMajorVersion + TCHAR(".") + pk_OSVer->dwMinorVersion;
        SendDlgItemMessage(hDlg, IDC_VERSION_OC, LB_ADDSTRING, 0, (LPARAM)version);
    }
    else
    SendDlgItemMessage(hDlg, IDC_VERSION_OC, LB_ADDSTRING, 0, (LPARAM)_T("0"));;
    delete pk_OSVer;
}

TCHAR version = TCHAR("Windows") + pk_OSVer->dwMajorVersion + TCHAR(".") + pk_OSVer->dwMinorVersion;

#if define(_UNICODE) || define(UNICODE)
#define _to_tstring(x) (std::to_wstring(x))
#else
#define _to_tstring(x) (std::to_string(x))
#endif
...
auto version = TCHAR("Windows") + 
               _to_tstring(pk_OSVer->dwMajorVersion) + 
               TCHAR(".") + 
               _to_tstring(pk_OSVer->dwMinorVersion);
SendDlgItemMessage(hDlg, IDC_VERSION_OC, LB_ADDSTRING, 0, (LPARAM)version.c_str());

#if defined(_UNICODE) || defined(UNICODE)

auto version = TCHAR("Windows") + _to_tstring((osvi.dwMajorVersion)) +
        TCHAR(".") +_to_tstring((osvi.dwMinorVersion));
    SendDlgItemMessage(hDlg, IDC_VERSION_OC, LB_ADDSTRING, 0, (LPARAM)version);

#include <Windows.h>
#include <stdio.h>
#include <VersionHelpers.h>
 
typedef NTSTATUS(NTAPI* fnRtlGetNtVersionNumbers)(LPDWORD major, LPDWORD minor, LPDWORD build);
typedef NTSTATUS(NTAPI* fnRtlGetVersion)(PRTL_OSVERSIONINFOEXW lpVersionInformation);
 
int main()
{
    DWORD major = 0, minor = 0, build = 0;
 
    auto RtlGetNtVersionNumbers = (fnRtlGetNtVersionNumbers)GetProcAddress(GetModuleHandleW(L"ntdll.dll"), "RtlGetNtVersionNumbers");
 
    if (RtlGetNtVersionNumbers)
        RtlGetNtVersionNumbers(&major, &minor, &build);
 
    RTL_OSVERSIONINFOEXW rtovi = { 0 };
 
    rtovi.dwOSVersionInfoSize = sizeof(rtovi);
    auto RtlGetVersion = (fnRtlGetVersion)GetProcAddress(GetModuleHandleW(L"ntdll.dll"), "RtlGetVersion");
    if (RtlGetVersion)
        RtlGetVersion(&rtovi);
 
    OSVERSIONINFOEX ovi = { 0 };
 
    ovi.dwOSVersionInfoSize = sizeof(ovi);
 
    GetVersionEx((OSVERSIONINFO*)&ovi);
 
    printf("RtlGetNtVersionNumbers: %u.%u.%u\n", major, minor, build);
    printf("RtlGetVersion           %u.%u.%u\n", rtovi.dwMajorVersion, rtovi.dwMinorVersion, rtovi.dwBuildNumber);
    printf("GetVersionEx:           %u.%u.%u\n", ovi.dwMajorVersion, ovi.dwMinorVersion, ovi.dwBuildNumber);
    printf("VersionHelper:\n  Win 10+: %s\n  Win 8.1+: %s\n  Win 8.0+: %s\n",
        IsWindows10OrGreater() ? "true" : "false",
        IsWindows8Point1OrGreater() ? "true" : "false",
        IsWindows8OrGreater() ? "true" : "false"
    );
 
    system("pause");
 
    return 0;
}

SendDlgItemMessage(hDlg, IDC_VERSION_OC, LB_ADDSTRING, 0, (LPARAM)version.c_str());