Unable to compile Script

[Snowdrop20]

C:\Users\anon\Desktop\Keylogger-master\windows\klog_main.cpp: In function 'int Save(int)':
C:\Users\anon\Desktop\Keylogger-master\windows\klog_main.cpp:91:66: error: 'strcpy_s' was not declared in this scope
strcpy_s(lastwindow, sizeof(lastwindow), window_title);
^

C:\Users\anon\Desktop\Keylogger-master\windows\klog_main.cpp:96:32: error: 'localtime_s' was not declared in this scope
localtime_s(&tm, &t);

[StanislasG]

Hey!
Thanks to the compile errors from the compiler I found a way.
By changing following lines I could compile the program.
If someone understand it more precisely, I would like to understand why it happened in the first place :-)
(I used g++ compiler from MinGW on Windows 10)

[line 54] MessageBox(NULL, (char *) a, (char *) b, MB_ICONERROR);
[line 91] strcpy(lastwindow, window_title);
[line 96] localtime(&t);