// Example program:
// Using SDL2 to create an application window

#include "SDL.h"
#include "SDL_syswm.h"
#include <stdio.h>
LRESULT CALLBACK My_WindowProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
    printf("%.8x\n", msg);
    return CallWindowProc(DefWindowProc, hwnd, msg, wParam, lParam);
}
int main(int argc, char* argv[]) {

    SDL_Window* window;                    // Declare a pointer

    SDL_Init(SDL_INIT_VIDEO);              // Initialize SDL2

    // Create an application window with the following settings:
    window = SDL_CreateWindow(
        "An SDL2 window",                  // window title
        SDL_WINDOWPOS_UNDEFINED,           // initial x position
        SDL_WINDOWPOS_UNDEFINED,           // initial y position
        640,                               // width, in pixels
        480,                               // height, in pixels
        SDL_WINDOW_OPENGL                  // flags - see below
    );

    // Check that the window was successfully created
    if (window == NULL) {
        // In the case that the window could not be made...
        printf("Could not create window: %s\n", SDL_GetError());
        return 1;
    }
    SDL_SysWMinfo wmInfo;
    SDL_VERSION(&wmInfo.version);
    SDL_GetWindowWMInfo(window, &wmInfo);
    HWND hwnd = wmInfo.info.win.window;
    // The window is open: could enter program loop here (see SDL_PollEvent())
    SetWindowLongPtr(hwnd, GWLP_WNDPROC, (LONG_PTR)My_WindowProc);
    int quit = 0;
    SDL_Event e;
    while (!quit)
    {
        //Handle events on queue
        while (SDL_PollEvent(&e) != 0)
        {
            //User requests quit
            if (e.type == SDL_QUIT)
            {
                quit = 1;
            }
        }
    }

    // Close and destroy the window
    SDL_DestroyWindow(window);

    // Clean up
    SDL_Quit();
    return 0;
}