Can´t get the avisynth+ filtersdk lib to compile (C++)

Question

How to get the avisynth+ library to work in c++? I am using Visual Studio 2017.

I have tried including the avisynth.h file from the avisynth+ git repo. Also including the avisynth+ git repo folder as a include and defined AMD64 and it wont compile

#include <Windows.h>
#include "pch.h"
#include <iostream>
#include <avisynth.h>


int main()
{
    IScriptEnvironment *env = CreateScriptEnvironment(2);

    return 0;
}

I get several

third operand to the conditional operator ?: is of type 'void', but the second operand is neither a throw-expression nor of type 'void'

expression must have arithmetic or unscoped enum type

errors in avisynth.h when i try to compile it