unit tree; interface uses Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs, StdCtrls, Buttons, ComCtrls, dxtree; type TForm2 = class(TForm) dxTreeView1: TdxTreeView; BitBtn1: TBitBtn; Label1: TLabel; Label2: TLabel; private { Private declarations } public { Public declarations } end; var Form2: TForm2; implementation {$R *.DFM} end.