function SrNodeTree(pTreeNode: TTreeNode; var sRuta: string): string; 
begin 
  sRuta := pTreeNode.Text + ' > ' + sRuta; 
  if pTreeNode.Level = 0 then Result := sRuta 
  else  
    Result := SrNodeTree(pTreeNode.Parent, sRuta); 
end; 

{*--------------------------------------------- 
  Click an Item 
 ---------------------------------------------*} 

procedure TForm1.TreeView1Click(Sender: TObject); 
var 
  sPath: string; 
begin 
  label1.Caption := SrNodeTree(TreeView1.Selected, sPath); 
end;