在哪个头文件中声明了函数“ _tcscpy_s”？

Question

Visual Studio 2015. I am reading the " Windows via C\\C++ " book and try to use its code samples. Author writes that the "safe" functions of string have the _s suffix and are declared in the StrSafe.h header. This header are to be the last in the list of includes. In my code I included such headers:

#include <iostream>
#include <exception>
#include <string>
#include <Windows.h>
#include <strsafe.h>

But I have a problem:

// IDE doesn't see the _tcscpy_s function
errno_t result = _tcscpy_s(szBuffer, _countof(szBuffer), TEXT("0123456789"));

I looked for info about the _tcscpy_s function, but I didn't see info about its header file (I expected that it is strsafe.h ).

How can I fix it?

Answer 1

Just like any other "Generic Text" string function version, the _tcscpy_s() function is declared in TCHAR.H (as mentioned in the documentation ).

Add #include <tchar.h> to your code.