本文以实例说明Delphi打印程序的实现方法。该实例可以检测系统中安装的所有打印机，枚举出这些打印机，主要功能代码非常简单，便于大家阅读与理解。

主要功能代码如下：

unit Unit1;
interface

uses
 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.