unit fInterfaceD; interface uses Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics, Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.ComCtrls, Vcl.ExtCtrls; type TfrmSandbox = class(TForm) PanelLeft: TPanel; tvBench: TTreeView; PageControl: TPageControl; tsOne: TTabSheet; tsTwo: TTabSheet; tsThree: TTabSheet; tsFour: TTabSheet; tsFive: TTabSheet; tsSix: TTabSheet; tsSeven: TTabSheet; private { Private declarations } public { Public declarations } end; var frmSandbox: TfrmSandbox; implementation {$R *.dfm} end.