unit Unit1;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls;

type
  TMyMethod = procedure(Param1: String) of object;

  TMyObj  = class
  published
    procedure MyMethod1(Param1: String);
  end;


  TForm1 = class(TForm)
    Button1: TButton;
    procedure Button1Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;
  MyObj: TMyObj;

implementation

{$R *.dfm}

procedure TMyObj.MyMethod1(Param1: String);
begin
  ShowMessage(Param1);
end;

procedure TForm1.Button1Click(Sender: TObject);
var
  q: TMyMethod;
begin
  MyObj := TMyObj.Create;
  @q := MyObj.MethodAddress('MyMethod1');
  if Assigned(q) then
    q('My Text');
  MyObj.Free;
end;

end.