RegistryHelper::keyEmpty

bool RegistryHelper::keyEmpty(wstring key)
{
    HKEY keyHandle = openKey(key, KEY_QUERY_VALUE | KEY_WOW64_64KEY);

    DWORD keyCount;
    DWORD valueCount;
    LSTATUS status = RegQueryInfoKeyW(keyHandle, NULL, NULL, NULL, &keyCount, NULL, NULL, &valueCount, NULL, NULL, NULL, NULL);

    RegCloseKey(keyHandle);

    if (status != ERROR_SUCCESS)
        throw RegistryException(L"Error while reading info for registry key " + key + L": " + StringHelper::getSystemErrorString(status));

    return keyCount == 0 && valueCount == 0;
}