How can I determine the names of the installed comm ports?

The following example demonstrates enumerating the communications ports that are installed and listed in the Win32 registry.

uses Registry; 

procedure TForm1.Button1Click(Sender: TObject); 
var 
  reg : TRegistry; 
  ts : TStrings; 
  i : integer; 
begin 
  reg := TRegistry.Create; 
  reg.RootKey := HKEY_LOCAL_MACHINE; 
  reg.OpenKey('hardware\devicemap\serialcomm', 
              false); 
  ts := TStringList.Create; 
  reg.GetValueNames(ts); 
  for i := 0 to ts.Count -1 do begin 
    Memo1.Lines.Add(reg.ReadString(ts.Strings[i])); 
  end; 
  ts.Free; 
  reg.CloseKey; 
  reg.free; 
end;