private void EnumerateCallback(IntPtr device, IntPtr context)
        {
            try
            {
                var mGuid = Guid.Empty;

                DirectOutputClass.GetDeviceType(device, ref mGuid);

                Console.WriteLine($"Adding new DirectOutput device {device} of type: {mGuid.ToString()}");

                //Called initially when enumerating FIPs.

                if (!IsFipDevice(device))
                {
                    return;
                }
                var fipPanel = new FipPanel(device);
                _fipPanels.Add(fipPanel);
                fipPanel.Initalize();
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex);
            }
        }
        private void DeviceCallback(IntPtr device, bool added, IntPtr context)
        {
            try
            {
                //Called whenever a DirectOutput device is added or removed from the system.
                Console.WriteLine("DeviceCallback(): 0x" + device.ToString("x") + (added ? " Added" : " Removed"));

                if (!IsFipDevice(device))
                {
                    return;
                }

                if (!added && _fipPanels.Count == 0)
                {
                    return;
                }

                var i     = _fipPanels.Count - 1;
                var found = false;
                do
                {
                    if (_fipPanels[i].FipDevicePointer == device)
                    {
                        found = true;
                        var fipPanel = _fipPanels[i];
                        if (!added)
                        {
                            fipPanel.Shutdown();
                            _fipPanels.Remove(fipPanel);
                        }
                    }
                    i--;
                } while (i >= 0);

                if (added && !found)
                {
                    Console.WriteLine("DeviceCallback() Spawning FipPanel. " + device);
                    var fipPanel = new FipPanel(device);
                    _fipPanels.Add(fipPanel);
                    fipPanel.Initalize();
                }
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex);
            }
        }