/// <summary>Occurs when the form is disposing.</summary>
        /// <param name="disposing">Whether Dispose was invoked by managed code.</param>
        private void FormDisposing(bool disposing)
        {
            for(int i = 0; i < _dx9Resources.Count; i++)
            {
                try { _dx9Resources[i].Dispose(); }
                catch { }
            }
            _dx9Resources.Clear();

            for(int i = 0; i < _disposableResources.Count; i++)
            {
                try { _disposableResources[i].Dispose(); }
                catch { }
            }
            _disposableResources.Clear();

            _input = null;
            _direct3D = null;
            _device = null;
        }
        /// <summary>Initialises the game.</summary>
        public void InitialiseGame()
        {
            _sys = new SlimDXSys(Program.CommandLineArguments);

            bool windowed = _sys.GameConfig.VideoWindowed;

            Screen screen = Screen.FromHandle(Handle);
            int width, height;

            StartPosition = FormStartPosition.Manual;
            WindowState = FormWindowState.Normal;
            if(windowed)
            {
                width = _sys.GameConfig.VideoWindowWidth(screen.Bounds.Width);
                height = _sys.GameConfig.VideoWindowHeight(screen.Bounds.Height);
                FormBorderStyle = FormBorderStyle.FixedSingle;
            }
            else
            {
                width = screen.Bounds.Width;
                height = screen.Bounds.Height;
                FormBorderStyle = FormBorderStyle.None;
            }

            ClientSize = new Size(width, height);

            if(windowed)
            {
                int left, top;
                if(_sys.GameConfig.VideoWindowCenter)
                {
                    left = (screen.Bounds.Width - Size.Width) / 2;
                    top = (screen.Bounds.Height - Size.Height) / 2;
                }
                else
                {
                    left = _sys.GameConfig.VideoWindowLeft(screen.Bounds.Right - 32);
                    top = _sys.GameConfig.VideoWindowTop(screen.Bounds.Bottom - 32);
                }
                Location = new Point(left, top);
            }

            bool vsync = _sys.GameConfig.VideoVSync;

            InitialiseDirect3D(windowed, vsync);

            _renderer = new DX9SoftwareRenderer();
            _renderer.Initialise(_device, 320, 200);
            _renderer.UseLinearFiltering = _sys.GameConfig.VideoFilter;
            AddResource(_renderer);

            _stopwatch = new Stopwatch();

            _hovertank = new Hovertank(_sys);
            _hovertank.StateInitialise();
            _disposableResources.Add(_sys);

            SoundSystem soundSystem = new SlimDXSoundSystem(this);
            _sys.InitialiseSound(soundSystem);
            _disposableResources.Add(soundSystem); // Note: The sound system needs to be disposed after sys

            _input = new SlimDXInputSystem(this);
            _sys.InitialiseInput(_input);
            _disposableResources.Add(_input);

            _stopwatch.Start();
        }