根据字符串找到函数并执行

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.