public MainForm() { InitializeComponent(); // Create a UsbAdapter instance. usbAdapter = UsbAdapter.GetInstance(); // Implement an event handler to receive pen connection events. usbAdapter.Connected += UsbAdapter_Connected; usbAdapter.Disconnected += UsbAdapter_Disconnected; TreeNode root = this.tvLocalDir.Nodes.Add("PC"); string[] drives = Directory.GetLogicalDrives(); foreach (string drive in drives) { TreeNode node = root.Nodes.Add(drive); node.Nodes.Add("@%"); } }