Why does Visual Studio 2013 error on C4996?

Question

In previous versions of Visual Studio using functions like _sleep or strncpy just outputs a warning. In the latest version, it\'s suddenly an error:

Answer 1

Just to add to this, _CRT_NONSTDC_NO_DEPRECATE worked for me in VS2019. _CRT_SECURE_NO_WARNINGS alone did not clear this for me (I have both defined).

Similar to the other answers, this may be added by right-clicking the project in Solution Explorer, Then going to Properties->Configuration Properties->C/C++->Preprocessor->Preprocessor Definitions->Edit... then adding the line _CRT_NONSTDC_NO_DEPRECATE.