Matt has answered the main question, but as an aside:
-D"_CRT_SECURE_NO_DEPRECATE" suppresses warning messages from Microsoft's
Visual C compiler for using various standard C library functions, rather than
using the optional "secure" ones (a misnomer, as they are at best somewhat
easier to use safely) added with C99 (in Appendix K of the C standard, I think;
I'm traveling and don't have my copy handy). It has nothing to do with OpenSSL
APIs, deprecated or otherwise; it just reduces noise from the Microsoft
compiler.
