Cannot get error code from GetPrivateProfileString - c++

Question

Here is my code.
char BPP[5];
int result, err;
result = GetPrivateProfileStringA("abc", "cba", NULL, BPP, 5, "D:\\aefeaf.ini"); // result = 0
result = _get_errno(&err); // result = 0, err = 0
result = GetLastError(); // result = 0
And description from MSDN: In the event the initialization file specified by lpFileName is not found, or contains invalid values, this function will set errorno with a value of '0x2' (File Not Found). To retrieve extended error information, call GetLastError.
Last parameter is random, the file is not existed. But GetLastError() still return 0. Could someone explain to me why it didn't return 2?
EDIT: As #JochenKalmbach suggest, I ensure my project is not using C++/CLI. And #claptrap said that errorno is a typo (it should be errno), I add _get_errno to my code above. But still, all the error code return is 0. Any help is much appreciated.

Answer 1

Hopefully you are not using C++/CLI... this will mess up the value of "GetLastError" because the code internally uses "IJW" (it just works) and does a bunch of Win32 operations....
FOr native applications, this works as expected:
#include <stdio.h>
#include <tchar.h>
#include <Windows.h>
#include <crtdbg.h>
int _tmain(int argv, char *argc[])
{
char szStr[5];
int result = GetPrivateProfileStringA("abc", "cba", NULL, szStr, 5, "D:\\aefeaf.ini");
_ASSERTE(result == 0);
result = GetLastError();
_ASSERTE(result == 2);
}
If you are using C++/CLI, then you should surround the method with
#pragma managed(push, off)
// Place the method here
#pragma managed(pop);