int GetRegistryStringValue(HKEY h_sub_key, WCHAR* value_name, wstring *result)
{
	DWORD cbData = 8;
	Debug *debug = Debug::GetInstance();

	LPDWORD type = NULL;

	//Get the size and type of the key
	int err = RegQueryValueEx(h_sub_key, value_name, NULL, type, NULL, &cbData);

	if (err != ERROR_SUCCESS)
	{
		debug->DebugMessage(Error::GetErrorMessageW(err));
		return err;
	}

	result->resize(cbData / sizeof(WCHAR));

	LPWSTR res = new WCHAR[(cbData + sizeof(L'\0')) / sizeof(WCHAR)];

	err = RegQueryValueEx(h_sub_key, value_name, NULL, NULL, (LPBYTE) &res[0], &cbData);

	if(err != ERROR_SUCCESS)
	{
		debug->DebugMessage(Error::GetErrorMessageW(err));
		return err;
	}

	res[cbData / sizeof(WCHAR)] = L'\0';

	result = new wstring(res);

	return ERROR_SUCCESS;
}