Date: 2021jan5 Product: Visual C++ Q. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details. A. If you do a #define _CRT_SECURE_NO_WARNING the warning is not disabled. Notice the warning number is given

warning C4996: 'fopen': This function or variable may be unsafe. Consider using fopen_s instead. C:\Program Files (x86)\Microsoft Visual Studio 8\VC\include\stdio.h(234) : see declaration of 'fopen'

So you can do

#pragma warning(disable: 4996) // Disable "This function or variable may be unsafe." for fopen() and others

To disable it. This can be done anywhere but in the "stdafx.h" is a good choice, if you have one. You can also add it in C/C++ > Preprocessor > Preprocessor Definitions but I prefer to have it in the code.