// declatation
SDL_Surface* g_pMainSurface = NULL;

//function
{

// check to see if we have hardware capabilities, this
// is botched from the SDL documentation (read: may not
// be doing it right). Returns the "We have hardware support.."

	const SDL_VideoInfo* vidcaps = SDL_GetVideoInfo();	
	if (vidcaps->hw_available)
		fprintf(stdout, "\nWe have hardware support!!\n");
	else
		fprintf(stdout, "\nWe have NO HARDWARE SUPPORT ;_;\n");

// actually create the surface. Note that the depth parameter
// doesn't make a difference because of SDL_ANYFORMAT, and that
// SDL_HWSURFACE is indeed ored in there (its a requirement for
// SDL_DOUBLEBUF).

	g_pMainSurface = SDL_SetVideoMode(640, 480, 32, (SDL_ANYFORMAT|SDL_HWSURFACE|SDL_DOUBLEBUF));

// surface created successfully (I'm able to draw to it); now
// we check to see if it contains the flags I requested. I know
// its not double buffered because the surface isn't clearing
// when I call SDL_Flip.

	if (g_pMainSurface->flags == (SDL_ANYFORMAT|SDL_HWSURFACE|SDL_DOUBLEBUF))
		fprintf(stdout, "\nEveryhint is working, dammit!");

// and finally, the render loop where I indeed do call SDL_Flip
// instead of SDL_UpdateRect.
        {
			SDL_Flip(g_pMainSurface);
        }
}