so i am getting alot of 2019 lnk errors.errors

I am new to c++ and following a ebook i found. (game programming in c++ sanjay madhav)
I have started today but now im kinda stuck by all the linker errors. they seem to be all kinda the same and i cant seem to find where they came from. i have added the dls and all correctly i think. i am running it in x86 cause it is what the book uses.

the problem is i cant seem to find how to get rid of them.
my project is made with sdl in a c++ language using visual studio.
here is my code:

Game.h

#pragma once
#include <SDL.h>
class Game {

public:
    Game();

    bool Initialize();

    void RunLoop();

    void Shutdown();
private:
    void ProcessInput();
    void UpdateGame();
    void GenerateOutput();

    SDL_Window* Window;
    bool IsRunning;
};

Game.cpp

#include "Game.h"

bool Game::Initialize() {
    int sdlResult = SDL_Init(SDL_INIT_VIDEO);
    if (sdlResult != 0)
    {
        SDL_Log("Unable to initialize SDL: %s", SDL_GetError());
        return false;
    }

    Window = SDL_CreateWindow(
        "Game Programming in c++ (Chapter 1)",
        100,
        100,
        1280,
        720,
        0
    );

    if (!Window) {
        SDL_Log("Failed to create window: %s", SDL_GetError());
        return false;
    }
    return true;
}

void Game::RunLoop() {
    while (IsRunning) {
        ProcessInput();
        UpdateGame();
        GenerateOutput();
    }
}

void Game::ProcessInput() {
    SDL_Event event;
    while (SDL_PollEvent(&event)) {
        switch (event.type) {
            case SDL_QUIT:
                IsRunning = false;
                break;
        }
    }

    const Uint8* state = SDL_GetKeyboardState(NULL);

}

void Game::Shutdown() {
    SDL_DestroyWindow(Window);
    SDL_Quit();
}

and Main.cpp

#include "Game.h"
#undef main
int main(int argc, char** argv) {
    Game game;
    bool succes = game.Initialize();
    if (succes) {
        game.RunLoop();
    }
    game.Shutdown();
    return 0;
}