_SCL_SECURE_NO_WARNINGS
Calling any one of the potentially unsafe methods in the Standard C++ Library will result in Compiler Warning (level 3) C4996. To disable this warning, define the macro _SCL_SECURE_NO_WARNINGS in your code:
#define _SCL_SECURE_NO_WARNINGS
Remarks
Other ways to disable warning C4996 include:
Using the /D (Preprocessor Definitions) compiler option:
cl /D_SCL_SECURE_NO_WARNINGS [other compiler options] myfile.cpp
Using the /w compiler option:
cl /wd4996 [other compiler options] myfile.cpp
Using the #pragma warning directive:
#pragma warning(disable:4996)
Also, you can manually change the level of warning C4996 with the /w<l><n> compiler option. For example, to set warning C4996 to level 4:
cl /w44996 [other compiler options] myfile.cpp
For more information, see /w, /Wn, /WX, /Wall, /wln, /wdn, /wen, /won (Warning Level).