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.