Meaning of this segment code

Question

Using a program that translate a .svg file to c++, I find

#include <math.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <GL/glut.h>
#include <GL/glu.h>
#include <GL/glaux.h>
#include <windows.h>
#include <stdarg.h>
//I can't understand the next line
int (WINAPIV * __vsnprintf)(char *, size_t, const char*, va_list) = _vsnprintf;

_______________________________________________

What does this last line mean?

Thank you in advance

Answer 1

It's a function pointer:
1. named __vsnprintf, (*__vsnprintf);
2. using the cdecl calling convention, (WINAPIV);
3. it takes 4 arguments of types ( char*, size_t, const char* and va_list );
4. returns an int ( the int at the front );
5. and is pointing to the function _vsnprintf ( = _vsnprintf ).

And that's the reason function pointers aren't a very liked part of C/C++.

Answer 2

thank you!!!