Remove _CRT_SECURE_NO_WARNINGS macro usage in example code, fix any errors arising from disabling this. (#1265)

Author: mkoscumb

examples/c/SampleC-Guest/main.cpp

@@ -1,5 +1,3 @@
-#define _CRT_SECURE_NO_WARNINGS
-
 #include <memory>
 #include <chrono>
 #include <thread>

examples/cpp/SampleCpp/main.cpp

@@ -1,5 +1,4 @@
 // #define _CRTDBG_MAP_ALLOC
-#define _CRT_SECURE_NO_WARNINGS
 //#include <stdlib.h>  
 //#include <crtdbg.h>
 

examples/cpp/SampleCppMini/main.cpp

@@ -1,5 +1,3 @@
-#define _CRT_SECURE_NO_WARNINGS
-
 #define API_KEY   "99999999999999999999999999999999-99999999-9999-9999-9999-999999999999-9999"
 
 #include <cstdio>

examples/cpp/SampleCppUWP/Main.cpp

@@ -1,6 +1,4 @@
-#define _CRT_SECURE_NO_WARNINGS
-
-#include <stdlib.h>
+#include <stdlib.h>
 #include <stdio.h>
 
 #include "LogManager.hpp"
@@ -44,7 +42,7 @@ void DebugPrintf(const char *fmt, ...)
     va_start(args, fmt);
     int nBuf;
     char szBuffer[512];
-    nBuf = _vsnprintf(szBuffer, 511, fmt, args);
+    nBuf = _vsnprintf_s(szBuffer, 511, fmt, args);
     // ::OutputDebugStringA(szBuffer);
     PrintLine(szBuffer);
     va_end(args);
@@ -231,7 +229,6 @@ EventProperties CreateSampleEvent(const char *name, EventPriority prio) {
 
     // Prepare current time in UTC (seconds precision)
     std::time_t t = std::time(nullptr);
-    std::gmtime(&t);
 
     /* С++11 constructor for Visual Studio 2015: this is the most JSON-lookalike syntax that makes use of C++11 initializer lists. */
     EventProperties props(name,

examples/cpp/SampleCppUWP/TelemetryInstance.cpp

@@ -1,5 +1,3 @@
-#define _CRT_SECURE_NO_WARNINGS
-
 #include "pch.h"
 
 #include "LogManager.hpp"

examples/cpp/SampleCppUWP/Utils.hpp

@@ -11,7 +11,7 @@ static void DebugPrintf(const char *fmt, ...)
     va_list args;
     va_start(args, fmt);
     int nBuf;
-    nBuf = _vsnprintf(szBuffer, MAX_BUFF_SIZE-1, fmt, args);
+    nBuf = _vsnprintf_s(szBuffer, MAX_BUFF_SIZE-1, fmt, args);
     ::OutputDebugStringA(szBuffer);
     ::OutputDebugStringA("\n"); // eppend endl
     va_end(args);