从国外网站上找的，编译出来的程序有点大，还有更好的方法。

program Project2;

{$APPTYPE CONSOLE}

uses
SysUtils,
ExtCtrls,
Classes;

type
PMethodPointer = ^TMethodPointer;
TMethodPointer = packed record
pMethod: Pointer;
pObject: TObject;
end;

var
T : TTimer;
p : TMethodPointer;
i : Integer;

procedure NotifyEvent(Self: TMethodPointer; Sender: TObject);
begin
writeln('yes');
beep;
end;

begin
T := TTimer.Create(nil);
T.Interval := 200; // -> l?st alle 200 ms das OnTimer-Event aus
try
p.pMethod := @NotifyEvent;
p.pObject := nil;
T.OnTimer := TNotifyEvent(p);

T.Enabled := true; // aktiviert den Timer
writeln('Warte auf Event: ');
for i := 1 to 5 do
begin
sleep(500);
writeln('warte ' + inttostr(i * 500) + 'ms...');
NotifyEvent(p, T);
end;
T.Enabled := false; // deaktiviert den Timer
finally
T.Free;
end;
end.