RegistryHelper::readBinaryValue

vector<unsigned char> RegistryHelper::readBinaryValue(wstring key, wstring valuename)
{
    HKEY keyHandle = openKey(key, KEY_QUERY_VALUE | KEY_WOW64_64KEY);

    LSTATUS status;
    DWORD type;
    DWORD bufSize;
    status = RegQueryValueExW(keyHandle, valuename.c_str(), NULL, &type, NULL, &bufSize);
    if (status != ERROR_SUCCESS)
    {
        RegCloseKey(keyHandle);
        throw RegistryException(L"Error while reading registry value " + key + L"\\" + valuename + L": " + StringHelper::getSystemErrorString(status));
    }

    if (type != REG_BINARY)
    {
        RegCloseKey(keyHandle);
        throw RegistryException(L"Registry value " + key + L"\\" + valuename + L" has wrong type");
    }

    vector<unsigned char> result(bufSize, 0);
    status = RegQueryValueExW(keyHandle, valuename.c_str(), NULL, NULL, result.data(), &bufSize);

    RegCloseKey(keyHandle);

    if (status != ERROR_SUCCESS)
    {
        throw RegistryException(L"Error while reading registry value " + key + L"\\" + valuename + L": " + StringHelper::getSystemErrorString(status));
    }

    return result;
}