RegistryHelper::writeValue

void RegistryHelper::writeValue(wstring key, wstring valuename, wstring value)
{
    HKEY keyHandle = openKey(key, KEY_SET_VALUE | KEY_WOW64_64KEY);

    LSTATUS status = RegSetValueExW(keyHandle, valuename.c_str(), 0, REG_SZ, (const BYTE*)value.c_str(), (DWORD)((value.size() + 1) * sizeof(wchar_t)));

    RegCloseKey(keyHandle);

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