DoGetOSInfo.cpp

DoGetOSInfo.cpp

#include <windows.h>
#include <string>
#include <strsafe.h>

std::wstring DoGetOSInfo(void)
{
    HKEY hKey = NULL;
    WCHAR szText[32];
    DWORD dwValue, cbData;
    std::wstring ret;
    LONG error;
    static const WCHAR s_szCurVer[] = L"SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion";

    ::RegOpenKeyExW(HKEY_LOCAL_MACHINE, s_szCurVer, 0, KEY_READ, &hKey);
    if (!hKey)
        return FALSE;

    // Windows 10 Home
    cbData = sizeof(szText);
    error = ::RegQueryValueExW(hKey, L"ProductName", NULL, NULL, (LPBYTE)szText, &cbData);
    if (!error)
    {
        ret = szText;
    }
    else
    {
        ret = L"Unknown OS";
        return ret;
    }

    // Version 1903
    cbData = sizeof(szText);
    error = ::RegQueryValueExW(hKey, L"ReleaseId", NULL, NULL, (LPBYTE)szText, &cbData);
    if (!error)
    {
        ret += L" Version ";
        ret += szText;
    }
    else
    {
        return ret;
    }

    // (OS Build 18362
    szText[0] = 0;
    cbData = sizeof(szText);
    ::RegQueryValueExW(hKey, L"CurrentBuild", NULL, NULL, (LPBYTE)szText, &cbData);
    ret += L" (OS Build ";
    ret += szText;

    // .295)
    dwValue = 0;
    cbData = sizeof(dwValue);
    ::RegQueryValueExW(hKey, L"UBR", NULL, NULL, (LPBYTE)&dwValue, &cbData);
    StringCbPrintfW(szText, sizeof(szText), L".%u)", dwValue);
    ret += szText;

    ::RegCloseKey(hKey);

    return ret;
}