Attempt to disable most of the warnings.

Define _CRT_SECURE_NO_WARNINGS and _CRT_NONSTDC_NO_DEPRECATE

CMakeLists.txt

@@ -6,6 +6,7 @@ include("FetchContent")
 
 if(MSVC)
 	add_compile_options("/FI${XPDevPlus_BINARY_DIR}/xpdevplus.h")
+	add_compile_definitions(NOMINMAX _CRT_SECURE_NO_WARNINGS _CRT_NONSTDC_NO_DEPRECATE)
 else()
 	add_compile_options("SHELL:-include xpdevplus.h")
 endif()