anchor.diff:     *  SDL_UpdateWindowSurfaceRect()
      *}
   
  -  function SDL_UpdateWindowSurfaceRects(window: PSDLWindow; rects: PSDLRect; numrects: SInt32): SInt32 cdecl; external {$IFDEF GPC} name 'SDL_UpdateWindowSurfaceRects' {$ELSE} SDL_LibName {$ENDIF};
  +  function SDL_UpdateWindowSurfaceRects(window: PSDL_Window; rects: PSDL_Rect; numrects: SInt32): SInt32 cdecl; external {$IFDEF GPC} name 'SDL_UpdateWindowSurfaceRects' {$ELSE} SDL_LibName {$ENDIF};
   
     {**
      *  Set a window's input grab mode.
  
positive.code:    *  SDL_HideWindow()
     *}
  
    procedure SDL_ShowWindow(window: PSDLWindow) cdecl; external {$IFDEF GPC} name 'SDL_ShowWindow' {$ELSE} SDL_LibName {$ENDIF};
  
    {**
     *  Hide a window.
  
negative.code:   SDL_RWOPS_MEMORY_RO =	5;	{* Read-Only memory stream *}
  
  type
    PSDL_RWops = ^TSDL_RWops;
  
    {**
     * This is the read/write operation structure -- very basic.
  