Remove SDL_WINDOW_SHOW flag, as redundant with SDL_WINDOW_HIDDEN

docs/README-visualc.md

@@ -87,7 +87,7 @@ Here's a sample SDL snippet to verify everything is setup in your IDE:
         SDL_Renderer* renderer = NULL;
 
         SDL_Init(SDL_INIT_VIDEO);
-        window = SDL_CreateWindow("Hello SDL", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, WIDTH, HEIGHT, SDL_WINDOW_SHOWN);
+        window = SDL_CreateWindow("Hello SDL", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, WIDTH, HEIGHT, 0);
         renderer = SDL_CreateRenderer(window, NULL, SDL_RENDERER_ACCELERATED | SDL_RENDERER_PRESENTVSYNC);
  
         SDL_DestroyRenderer(renderer);