本文整理自网络，侵删。
关键字：MethodAddress：取得方法的地址，这个方法需要是published的。
unit Unit1;
interface
uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, StdCtrls;
type
TShowInfo = procedure(info:string) of object; //声明一个procedure类型，参数和ShowInfo一致
TForm1 = class(TForm)
Button1: TButton;
procedure Button1Click(Sender: TObject);
private
{ Private declarations }
public
{ Public declarations }
published
procedure ShowInfo(info:string);
end;
var
Form1: TForm1;
implementation
{$R *.dfm}
{ TForm1 }
procedure TForm1.ShowInfo(info: string);
begin
ShowMessage(info);
end;
procedure TForm1.Button1Click(Sender: TObject);
var
s:TShowInfo;
begin
@s := MethodAddress('ShowInfo'); //取得ShowInfo的地址
if @s <> nil then //如果不为空
begin
s('中华人民共和国'); //执行
end;
end;
end.
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