[[coso]]

echandole un vistazo a 'classes.pas', donde se encuentra la definicion de esta clase (en Delphi, en C++ sera equivalente):

Código Delphi [-]
procedure TStrings.LoadFromFile(const FileName: string);
var
  Stream: TStream;
begin
  Stream := TFileStream.Create(FileName, fmOpenRead or fmShareDenyWrite);
  try
    LoadFromStream(Stream);
  finally
    Stream.Free;
  end;
end;
procedure TStrings.LoadFromStream(Stream: TStream);
var
  Size: Integer;
  S: string;
begin
  BeginUpdate;
  try
    Size := Stream.Size - Stream.Position;
    SetString(S, nil, Size);
    Stream.Read(Pointer(S)^, Size);
    SetTextStr(S);
  finally
    EndUpdate;
  end;
end;