Оформил: DeeCo
Автор: http://www.swissdelphicenter.ch

procedure CenterControl(ParentObject, CenterObject: TControl; bTop, bLeft: Boolean;
   Space: Integer);
 begin
   with CenterObject do
   begin
     if bLeft then
       Left := ParentObject.Width div 2 - Width div 2 + Space;

     if bTop then
       Top := ParentObject.Height div 2 - Height div 2;
   end;
 end;

 procedure TForm1.Button2Click(Sender: TObject);
 begin
   CenterControl(Panel1, Button1, True, True, 0);
 end;