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...

implementation

{$R *.dfm}
uses Printers;

var dst: TStrings;

procedure TForm1.FormCreate(Sender: TObject);

begin
  dst := TStringList.Create;
  dst := Printer.Printers;
  Listbox1.Items := dst;
  Listbox1.ItemIndex := Printer.PrinterIndex;
end;

procedure TForm1.FormClose(Sender: TObject; var Action: TCloseAction);
begin
  dst.Free;
end;

procedure TForm1.Button1Click(Sender: TObject);
begin
  Form1.Close;
end;

end.					

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dst.Text := Printer.Printers.Text