There is no need to create an instance of TPrinter using TPrinter.Create, as an instance of TPrinter (called Printer) is automatically created when you use the Printers unit. Example:

uses Printers;
procedure TForm .Button Click(Sender: TObject);
begin
   Printer.BeginDoc;
   Printer.Canvas.TextOut( 00,  00, 'Hello World!');
   Printer.EndDoc;
end;