Error 1 error C4996: 'std::_Copy_impl': Function call with parameters that may be unsafe - this call relies on the caller to check that the passed values are correct. To disable this warning, use -D_SCL_SECURE_NO_WARNINGS. See documentation on how to use Visual C++ 'Checked Iterators' c:\program files (x86)\microsoft visual studio 12.0\vc\include\xutility 2132 1 ProtobufTest

Error   1   error C4996: 'std::_Copy_impl': Function call with parameters that may be unsafe - this call relies on the caller to check that the passed values are correct. To disable this warning, use -D_SCL_SECURE_NO_WARNINGS. See documentation on how to use Visual C++ 'Checked Iterators'   c:\program files (x86)\microsoft visual studio 12.0\vc\include\xutility 2132    1   ProtobufTest

You should define this as simply _SCL_SECURE_NO_WARNINGS. It's best to do this in Project Properties -> C++ -> Preprocessor, to have it consistent across all your code.