c++ SDL problem

Zdravo folk...mam en problem in sicer ko hočem zagnat program mi se pojavi ta error:failed loading libpng16-16.dl... uporabljam win10 okolje pa je visual studio 2015.. vse dll include in libary datoteke imam na svojem mestu tudi dll sliko imam tam ko imam main.cpp file....torej mogoče kvo ve kako rešit ta problem??
aja koda ni moja je iz lazyfoo foruma

#include <SDL.h>
#include <SDL_image.h>
#include <stdio.h>
#include <string>

//Screen dimension constants
const int SCREEN_WIDTH = 640;
const int SCREEN_HEIGHT = 480;

//Starts up SDL and creates window
bool init();

//Loads media
bool loadMedia();

//Frees media and shuts down SDL
void close();

//Loads individual image as texture
SDL_Texture* loadTexture(std::string path);

//The window we'll be rendering to
SDL_Window* gWindow = NULL;

//The window renderer
SDL_Renderer* gRenderer = NULL;

//Current displayed texture
SDL_Texture* gTexture = NULL;

bool init()
{
	//Initialization flag
	bool success = true;

	//Initialize SDL
	if (SDL_Init(SDL_INIT_VIDEO) < 0)
	{
		printf("SDL could not initialize! SDL Error: %s\n", SDL_GetError());
		success = false;
	}
	else
	{
		//Set texture filtering to linear
		if (!SDL_SetHint(SDL_HINT_RENDER_SCALE_QUALITY, "1"))
		{
			printf("Warning: Linear texture filtering not enabled!");
		}

		//Create window
		gWindow = SDL_CreateWindow("SDL Tutorial", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, SCREEN_WIDTH, SCREEN_HEIGHT, SDL_WINDOW_SHOWN);
		if (gWindow == NULL)
		{
			printf("Window could not be created! SDL Error: %s\n", SDL_GetError());
			success = false;
		}
		else
		{
			//Create renderer for window
			gRenderer = SDL_CreateRenderer(gWindow, -1, SDL_RENDERER_ACCELERATED);
			if (gRenderer == NULL)
			{
				printf("Renderer could not be created! SDL Error: %s\n", SDL_GetError());
				success = false;
			}
			else
			{
				//Initialize renderer color
				SDL_SetRenderDrawColor(gRenderer, 0xFF, 0xFF, 0xFF, 0xFF);

				//Initialize PNG loading
				int imgFlags = IMG_INIT_PNG;
				if (!(IMG_Init(imgFlags) & imgFlags))
				{
					printf("SDL_image could not initialize! SDL_image Error: %s\n", IMG_GetError());
					success = false;
				}
			}
		}
	}

	return success;
}

bool loadMedia()
{
	//Loading success flag
	bool success = true;

	//Load PNG texture
	gTexture = loadTexture("loaded.png");
	if (gTexture == NULL)
	{
		printf("Failed to load texture image!\n");
		success = false;
	}

	return success;
}

void close()
{
	//Free loaded image
	SDL_DestroyTexture(gTexture);
	gTexture = NULL;

	//Destroy window	
	SDL_DestroyRenderer(gRenderer);
	SDL_DestroyWindow(gWindow);
	gWindow = NULL;
	gRenderer = NULL;

	//Quit SDL subsystems
	IMG_Quit();
	SDL_Quit();
}

SDL_Texture* loadTexture(std::string path)
{
	//The final texture
	SDL_Texture* newTexture = NULL;

	//Load image at specified path
	SDL_Surface* loadedSurface = IMG_Load(path.c_str());
	if (loadedSurface == NULL)
	{
		printf("Unable to load image %s! SDL_image Error: %s\n", path.c_str(), IMG_GetError());
	}
	else
	{
		//Create texture from surface pixels
		newTexture = SDL_CreateTextureFromSurface(gRenderer, loadedSurface);
		if (newTexture == NULL)
		{
			printf("Unable to create texture from %s! SDL Error: %s\n", path.c_str(), SDL_GetError());
		}

		//Get rid of old loaded surface
		SDL_FreeSurface(loadedSurface);
	}

	return newTexture;
}

int main(int argc, char* args[])
{
	//Start up SDL and create window
	if (!init())
	{
		printf("Failed to initialize!\n");
	}
	else
	{
		//Load media
		if (!loadMedia())
		{
			printf("Failed to load media!\n");
		}
		else
		{
			//Main loop flag
			bool quit = false;

			//Event handler
			SDL_Event e;

			//While application is running
			while (!quit)
			{
				//Handle events on queue
				while (SDL_PollEvent(&e) != 0)
				{
					//User requests quit
					if (e.type == SDL_QUIT)
					{
						quit = true;
					}
				}

				//Clear screen
				SDL_RenderClear(gRenderer);

				//Render texture to screen
				SDL_RenderCopy(gRenderer, gTexture, NULL, NULL);

				//Update screen
				SDL_RenderPresent(gRenderer);
			}
		}
	}

	//Free resources and close SDL
	close();

	return 0;
}

hvala rozman ampak to mam vse narejeno mam:
SDL2.lib
SDL2main.lib
SDL2_image.lib