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Exemplo de uso de variant quando não se sabe quantos parametros serão passados e qual

Código

Unit Unit1;

interface

uses

  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,

  Dialogs, StdCtrls;

type

  TForm1 = class(TForm)

    Button1: TButton;

    procedure Button1Click(Sender: TObject);

  private

    { Private declarations }

  public

    { Public declarations }

    procedure Mensagens(mens : array of variant);

  end;

var

  Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.Button1Click(Sender: TObject);

begin

  mensagens(['ola','tudo bem']);

end;

procedure TForm1.Mensagens(mens: array of variant);

var i : integer;

begin

  for i:=0 to high(mens) do

    ShowMessage(mens[i]);

end;

end.