Автор: Mikel
WEB-сайт: http://forum.vingrad.ru

{uses ShellApi}

procedure TForm1.ListBox1DblClick(Sender: TObject);
var
  s: string;
begin
  s := listbox1.Items[SendMessage(ListBox1.Handle, lb_GetCurSel, 0, 0)];

  if edit1.Text[length(edit1.text)] <> '\' then
    edit1.text := concat(edit1.text + '\');

  if (not FileExists(edit1.text + s)) and (s[1] = '[') and (s[length(s)] = ']')
    then
    DlgDirList(handle,
      PChar(edit1.text + copy(s, 2, length(s) - 2)),
      ListBox1.Handle,
      Edit1.Handle,
      faAnyFile
      );

  if edit1.Text[length(edit1.text)] <> '\' then
    edit1.text := concat(edit1.text + '\');

  if FileExists(edit1.text + s) then
  begin
    caption := edit1.text + s;
    ShellExecute(handle, 'open', PChar(edit1.text + s), '', 'c:\', sw_show);
  end
end;

procedure TForm1.FormShow(Sender: TObject);
begin
  edit1.Width := 1024 * 8 - 1;
  edit1.Visible := false;
  DlgDirList(handle,
    PChar('c:\'),
    ListBox1.Handle,
    Edit1.Handle,
    faAnyFile
    );
  listbox1.Sorted := false;
  listbox1.Sorted := true;
end;