}

            // Change to a Direct3D device created from the new device settings
            // If there is an existing device, either reset or recreate
            ChangeDevice(settings, null, false);
        }


        /// <summary>
        /// Creates a Direct3D device.  If CreateWindow or SetWindow has not already
        /// been called, it will call CreateWindow with default parameters.
        /// Instead of calling this, you can call SetDevice or CreateDeviceFromSettings
        /// This is the CLS compliant version
        /// </summary>
        public void CreateDevice(int adapterOridinal, bool windowed, int suggestedWidth,
            int suggestedHeight, IDeviceCreation callback)
        {
            CreateDevice((uint)adapterOridinal, windowed, suggestedWidth,
            suggestedHeight, callback);
        }


        /// <summary>
        /// Passes a previously created Direct3D device for use by the framework.  
        /// If CreateWindow() has not already been called, it will call it with the 
        /// default parameters.  Instead of calling this, you can call CreateDevice() or 
        /// CreateDeviceFromSettings() 
        /// </summary>
        public void SetDevice(Device device)
        {
            if (device == null)
                throw new ArgumentNullException("device", "You cannot pass in a null device to SetDevice");

            if (State.IsInsideDeviceCallback)
                throw new InvalidOperationException("You cannot set a device from inside a callback.");

            // Was the window created? If not, create it now
            if (!State.WasWindowCreated)
            {
                // If CreateWindow or SetWindow was already called and failed, then fail again.
                if (State.WasWindowCreateCalled)
                {
                    throw new InvalidOperationException("CreateWindow was already called and failed.");
                }

                // Create a default window
                CreateWindow("Direct3D Window", null, null, -1, -1);
            }

            DeviceSettings deviceSettings = new DeviceSettings();

            // Get the present parameters from the swap chain
            using(Surface backBuffer = device.GetBackBuffer(0, 0, BackBufferType.Mono))
            {
                using (SwapChain swap = backBuffer.GetContainer(InterfaceGuid.SwapChain) as SwapChain)
                {
                    deviceSettings.presentParams = swap.PresentParameters;
                    System.Diagnostics.Debug.Assert(deviceSettings.presentParams != null, "You must have valid present parameters here.");
                }
            }

            DeviceCreationParameters creationParams = device.CreationParameters;

            // Fill out the device settings structure now
            deviceSettings.AdapterOrdinal = (uint)creationParams.AdapterOrdinal;    
            deviceSettings.DeviceType = creationParams.DeviceType;
            deviceSettings.AdapterFormat = FindAdapterFormat(deviceSettings.AdapterOrdinal,
                deviceSettings.DeviceType, deviceSettings.presentParams.BackBufferFormat,
                deviceSettings.presentParams.Windowed);
            deviceSettings.BehaviorFlags = creationParams.Behavior.Value;

            // Change to the Direct3D device passed in
            ChangeDevice(deviceSettings, device, false);
        }

        /// <summary>
        /// Tells the framework to change to a device created from the passed in device settings
        /// If CreateWindow() has not already been called, it will call it with the 
        /// default parameters.  Instead of calling this, you can call CreateDevice() 
        /// or SetDevice() 
        /// </summary>
        public void CreateDeviceFromSettings(DeviceSettings deviceSettings, bool preserveInput)
        {
            // Set the state since this was called
            State.WasDeviceCreateCalled = true;

            // Was the window created? If not, create it now
            if (!State.WasWindowCreated)
            {
                // If CreateWindow or SetWindow was already called and failed, then fail again.
                if (State.WasWindowCreateCalled)
                {
                    throw new InvalidOperationException("CreateWindow was already called and failed.");
                }

                // Create a default window
                CreateWindow("Direct3D Window", null, null, -1, -1);
            }

            if (!preserveInput)
            {
                // If not preserving the input, the find the closest valid to it
                MatchOptions match = new MatchOptions();
                match.AdapterOrdinal = MatchType.ClosestToInput;
                match.DeviceType = MatchType.ClosestToInput;
                match.Windowed = MatchType.ClosestToInput;
                match.AdapterFormat = MatchType.ClosestToInput;
                match.VertexProcessing = MatchType.ClosestToInput;
                match.Resolution = MatchType.ClosestToInput;
                match.BackBufferFormat = MatchType.ClosestToInput;
                match.BackBufferCount = MatchType.ClosestToInput;
                match.MultiSample = MatchType.ClosestToInput;
                match.SwapEffect = MatchType.ClosestToInput;
                match.DepthFormat = MatchType.ClosestToInput;
                match.StencilFormat = MatchType.ClosestToInput;
                match.PresentFlags = MatchType.ClosestToInput;
                match.RefreshRate = MatchType.ClosestToInput;
                match.PresentInterval = MatchType.ClosestToInput;

                try
                {
                    deviceSettings = FindValidDeviceSettings(deviceSettings, match);
                }
                catch(Exception e)
                {
                    // Display any error message
                    DisplayErrorMessage(e);
                    throw;
                }
                // Change to a Direct3D device created from the new device settings.  
                // If there is an existing device, then either reset or recreate the scene
                ChangeDevice(deviceSettings, null, false);
            }
        }
        /// <summary>
        /// Tells the framework to change to a device created from the passed in device settings
        /// If CreateWindow() has not already been called, it will call it with the 
        /// default parameters.  Instead of calling this, you can call CreateDevice() 
        /// or SetDevice() 
        /// </summary>
        public void CreateDeviceFromSettings(DeviceSettings deviceSettings) { CreateDeviceFromSettings(deviceSettings, false); }

        /// <summary>
        /// Toggle between full screen and windowed
        /// </summary>
        public void ToggleFullscreen()
        {
            // Pause the application
            Pause(true, true);

            // Get the current device settings and flip the windowed state then
            // find the closest valid device settings with this change
            DeviceSettings currentSettings = State.CurrentDeviceSettings.Clone();
            currentSettings.presentParams.Windowed = !currentSettings.presentParams.Windowed;

            MatchOptions match = new MatchOptions();
            match.AdapterOrdinal = MatchType.PreserveInput;
            match.DeviceType = MatchType.ClosestToInput;
            match.Windowed = MatchType.PreserveInput;
            match.AdapterFormat = MatchType.IgnoreInput;
            match.VertexProcessing = MatchType.ClosestToInput;
            match.BackBufferFormat = MatchType.IgnoreInput;
            match.BackBufferCount = MatchType.ClosestToInput;
            match.MultiSample = MatchType.ClosestToInput;
            match.SwapEffect = MatchType.ClosestToInput;
            match.DepthFormat = MatchType.ClosestToInput;
            match.StencilFormat = MatchType.ClosestToInput;
            match.PresentFlags = MatchType.ClosestToInput;
            match.RefreshRate = MatchType.IgnoreInput;
            match.PresentInterval = MatchType.IgnoreInput;

            System.Drawing.Rectangle windowClient;
            if (currentSettings.presentParams.Windowed)
                windowClient = State.ClientRectangle;
            else
                windowClient = State.FullScreenClientRectangle;

            if (windowClient.Width > 0 && windowClient.Height > 0)
            {
                match.Resolution = MatchType.ClosestToInput;
                currentSettings.presentParams.BackBufferWidth = windowClient.Width;
                currentSettings.presentParams.BackBufferHeight = windowClient.Height;
            }
            else
            {
                match.Resolution = MatchType.IgnoreInput;
            }

            try
            {
                if ( (!currentSettings.presentParams.Windowed) && (State.IsMaximized))
                {
                    if (WindowForm != null)
                    {
                        WindowForm.WindowState = System.Windows.Forms.FormWindowState.Normal;
                    }
                    toggleMaximized = true;
                }
                currentSettings = FindValidDeviceSettings(currentSettings, match);
                ChangeDevice(currentSettings, null, false);
                Window.Size = State.WindowBoundsRectangle.Size;                
                Window.Location = State.WindowBoundsRectangle.Location;                
                if (currentSettings.presentParams.Windowed)
                {
                    if (toggleMaximized)
                    {
                        if (WindowForm != null)
                        {
                            WindowForm.WindowState = System.Windows.Forms.FormWindowState.Maximized;
                        }
                    }
                    toggleMaximized = false;
                }
            }
            finally
            {
                // Well, unpause no matter what
                Pause(false, false);
                State.CurrentDeviceSettings = currentSettings;
            }
        }

        
        /// <summary>
        /// Toggle between Hardware and Reference
        /// </summary>
        public void ToggleReference()
        {
            // Get the current device settings 
            DeviceSettings currentSettings = State.CurrentDeviceSettings.Clone();
            if (currentSettings.DeviceType == DeviceType.Hardware)
                currentSettings.DeviceType = DeviceType.Reference;
            else if (currentSettings.DeviceType == DeviceType.Reference)
                currentSettings.DeviceType = DeviceType.Hardware;

            MatchOptions match = new MatchOptions();
            match.AdapterOrdinal = MatchType.PreserveInput;
            match.DeviceType = MatchType.PreserveInput;
            match.Windowed = MatchType.ClosestToInput;
            match.AdapterFormat = MatchType.ClosestToInput;
            match.VertexProcessing = MatchType.ClosestToInput;
            match.Resolution = MatchType.ClosestToInput;
            match.BackBufferFormat = MatchType.ClosestToInput;
            match.BackBufferCount = MatchType.ClosestToInput;
            match.MultiSample = MatchType.ClosestToInput;
            match.SwapEffect = MatchType.ClosestToInput;
            match.DepthFormat = MatchType.ClosestToInput;
            match.StencilFormat = MatchType.ClosestToInput;
            match.PresentFlags = MatchType.ClosestToInput;
            match.RefreshRate = MatchType.ClosestToInput;
            match.PresentInterval = MatchType.ClosestToInput;

            try
            {
                currentSettings = FindValidDeviceSettings(currentSettings, match);
                ChangeDevice(currentSettings, null, false);
            }
#if(DEBUG)
            catch (Exception e)
            {
                // In debug mode show this error (maybe - depending on settings)
                DisplayErrorMessage(e);
#else
            catch
            {
                // In release mode fail silently
#endif
            }
            finally
            {
                // Update the current settings
                State.CurrentDeviceSettings = currentSettings;
            }
        }

        /// <summary>
        /// This function tries to find valid device settings based upon the input device settings 
        /// struct and the match options.  For each device setting a match option in the