Why the following code successfully compiles with VS2015 without errors and warnings? And what is "IsInternetESCEnabledFunc()" ?

```
#include <SDKDDKVer.h>
#include <stdio.h>
#include <tchar.h>
#include <windows.h>

typedef VOID
(WINAPI
    *IsInternetESCEnabledFunc)(
        OUT BOOL
        );

IsInternetESCEnabledFunc IsInternetESCEnabled_lb;

int main()
{
    auto something = IsInternetESCEnabledFunc();

    return 0;
}

```