public String readMulti(Key key, String valueName) throws RegistryErrorException
  {
    if(key == null)
      throw new NullPointerException("Registry key cannot be null");
    if(valueName == null)
      throw new NullPointerException("Valuename cannot be null, because the default value is always a STRING! If you want to read a String use readValue");
    String ret = extractAnyValue(key.getPath(), valueName);
    //if it is not null and it starts with hex: it is hopefully a binary entry
    if(ret != null && ret.startsWith(MULTI_KEY))
    {
      return ret.substring(7);
    }
    return null;
  }