Delphi实现检测并枚举系统安装的打印机的方法

unit Unit1;interfaceuses Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms, Dialogs, StdCtrls,Printers, XPMan;type TForm1 = class(TForm)  Button1: TButton;  GroupBox1: TGroupBox;  Memo1: TMemo;  Button2: TButton;  procedure Button1Click(Sender: TObject);  procedure Button2Click(Sender: TObject); private  { Private declarations } public  { Public declarations } end;var Form1: TForm1;implementation{$R *.dfm}procedure TForm1.Button1Click(Sender: TObject);begin Memo1.Clear; memo1.Lines.Assign(Printer.Printers); if trim(memo1.Text) = '' then begin  showmessage('没有安装打印机！'); end;end;procedure TForm1.Button2Click(Sender: TObject);begin Close;end;end.