form.LoadItems

private void LoadItems()
		{
            _loading = true;
			treeViewDisks.Nodes.Clear();

			TreeNode root = treeViewDisks.Nodes.Add("Computer");
			root.ImageIndex = (int)IconIndex.MyComputer;
			root.SelectedImageIndex = root.ImageIndex;

            // display volumes
            VolumeDeviceClass volumeDeviceClass = new VolumeDeviceClass();
            TreeNode volumesNode = new TreeNode("Volumes");
            volumesNode.ImageIndex = (int)IconIndex.Volume;
            volumesNode.SelectedImageIndex = volumesNode.ImageIndex;
            root.Nodes.Add(volumesNode);

            foreach (Volume device in volumeDeviceClass.Devices)
            {
                if ((usbOnlyToolStripMenuItem.Checked) && (!device.IsUsb))
                    continue;

                string text = null;
                if ((device.LogicalDrive != null) && (device.LogicalDrive.Length > 0))
                {
                    text += device.LogicalDrive;
                }

                if (text != null)
                {
                    text += " ";
                }
                text += device.Description;
                if (device.FriendlyName != null)
                {
                    if (text != null)
                    {
                        text += " - ";
                    }
                    text += device.FriendlyName;
                }

                TreeNode deviceNode = volumesNode.Nodes.Add(text);

                if (device.IsUsb)
                {
                    deviceNode.ImageIndex = (int)IconIndex.Box;
                    deviceNode.SelectedImageIndex = deviceNode.ImageIndex;
                }
                deviceNode.Tag = device;

                foreach (Device disk in device.Disks)
                {
                    TreeNode diskNode = deviceNode.Nodes.Add(disk.Description + " - " + disk.FriendlyName);
                    diskNode.ImageIndex = deviceNode.ImageIndex;
                    diskNode.SelectedImageIndex = diskNode.ImageIndex;
                    diskNode.Tag = device;
                }
            }

            root.ExpandAll();
            _loading = false;
        }