unit Unit1;

interface

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

type
  PInteger = ^Integer;
  TForm1 = class(TForm)
    procedure FormCreate(Sender: TObject);
  private
    { Private-Deklarationen }
  public
    { Public-Deklarationen }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

Function Test (a: PInteger): Integer;
begin
  ShowMessage(IntToStr(a^));
  Result := a;
end;



procedure TForm1.FormCreate(Sender: TObject);
var ID: Cardinal;
    Handle: THandle;
    I: Integer;
begin
  I := 20;
  Handle := BeginThread(nil, 0, @Test, @I, 0, ID);
end;

end.