Find the port of a named printer device

{You need this Code to get the Port for a Printer.}

uses registry;

function Get_Printerport(Printername: String): string;
var
  Reg: TRegistry;
begin
  Reg := TRegistry.Create;
  with Reg do
  begin
    RootKey := HKEY_LOCAL_MACHINE;
     if OpenKey('\System\CurrentControlSet\Control\Print\printers\' + Printername + '\', True) then
       if ValueExists('port') then
       Result := Readstring('port');
      CloseKey;
  end;
end;