Thread: make my program start on startup.

Alright why I get errors here?
I did exactly as it said.

Code:

#include <cstdlib>
#include <iostream>
#include <windows.h>

using namespace std;

int main()
{
    char x;
    
    cout << "A) Add this program to startup";
    cout << "B) Exit \n\n";
    
    cin >> x;
    
    if(x == 'a')
    {
        extern "C" BOOL xAddSelfAsStartupShortcut(LPCTSTR szLinkTitle, LPCTSTR szDescription, LPCTSTR szArguments, int IconResourceID);
        xAddSelfAsStartupShortcut(TEXT("My Program"), TEXT("My description"), NULL, -1);

        return 0;
    }
    
    if(x == 'b')
    {
         return 0;
    }
    
    else
    {
        cout << "Wrong input! \n\n";
        main();
    }
    
    return 0;
}

Pictures:
I got the startup code added to my project as a .c file
I got the linker options added to the project
The errors

Whats wrong?
I used anonytmouse's code from his link.