Show Directories in a TTreeview

Show Directories in a TTreeview

procedure TForm1.GetDirectories(Tree: TTreeView; Directory: string; Item: TTreeNode; IncludeFiles: Boolean);
var
  SearchRec: TSearchRec;
  ItemTemp: TTreeNode;
begin
  Tree.Items.BeginUpdate;
  if Directory[Length(Directory)] <> '\' then Directory := Directory + '\';
  if FindFirst(Directory + '*.*', faDirectory, SearchRec) = 0 then
  begin
    repeat
      if (SearchRec.Attr and faDirectory = faDirectory) and (SearchRec.Name[1] <> '.') then
      begin
        if (SearchRec.Attr and faDirectory > 0) then
          Item := Tree.Items.AddChild(Item, SearchRec.Name);
        ItemTemp := Item.Parent;
        GetDirectories(Tree, Directory + SearchRec.Name, Item, IncludeFiles);
        Item := ItemTemp;
      end
      else if IncludeFiles then
        if SearchRec.Name[1] <> '.' then
          Tree.Items.AddChild(Item, SearchRec.Name);
    until FindNext(SearchRec) <> 0;
    FindClose(SearchRec);
  end;
  Tree.Items.EndUpdate;
end;

procedure TForm1.Button1Click(Sender: TObject);
var
  Node: TTreeNode;
  Path: string;
  Dir: string;
begin
  Dir := 'c:\temp';
  Screen.Cursor := crHourGlass;
  TreeView1.Items.BeginUpdate;
  try
    TreeView1.Items.Clear;
    GetDirectories(TreeView1, Dir, nil, True);
  finally
    Screen.Cursor := crDefault;
    TreeView1.Items.EndUpdate;
  end;
end;