---

HKEY hKey = nullptr;

if (RegCreateKeyExW(
        HKEY_CURRENT_USER,
        L"Software\\MyApp",
        0,
        nullptr,
        REG_OPTION_NON_VOLATILE,
        KEY_WRITE,
        nullptr,
        &hKey,
        nullptr) == ERROR_SUCCESS) {

    const std::wstring ver = L"2.0";

    RegSetValueExW(
        hKey,
        L"Version",
        0,
        REG_SZ,
        reinterpret_cast<const BYTE*>(ver.c_str()),
        static_cast<DWORD>(
            (ver.size() + 1) * sizeof(wchar_t)
        )
    );

    RegCloseKey(hKey);
}