var
  ...
  testStringFormat: TGPStringFormat;
begin
  ...
  testStringFormat := TGPStringFormat.Create;

  testgraphics.DrawString('Hello', 5, testFont, MakeRect(0.0, 0.0, 50.0, 50.0), testStringFormat, testBrush);
  testgraphics.DrawString('Hello Finally', 5, testFont, MakePoint(0.0, 0.0), testBrush);
end;