tray unden component

Hvad gør jeg forkert her

unit Unit1;

interface

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

type
  TForm1 = class(TForm)
    procedure FormCreate(Sender: TObject);
    procedure FormDestroy(Sender: TObject);
    procedure TrayMessage (var Msg: TMessage);
  private
    TrayIconData: TNotifyIconData;
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.FormCreate(Sender: TObject);
begin

  Application.ShowMainForm := False;


  with TrayIconData do
  begin
    cbSize := SizeOf(TrayIconData);
    Wnd := Handle;
    uID := 0;
    uFlags := NIF_MESSAGE + NIF_ICON + NIF_TIP;
  //  uCallbackMessage := WM_ICONTRAY;
    hIcon := form1.Icon.Handle;
    StrPCopy(szTip, Application.Title);
  end;

  Shell_NotifyIcon(NIM_ADD, @TrayIconData);

end;

procedure TForm1.FormDestroy(Sender: TObject);
begin
  Shell_NotifyIcon(NIM_DELETE, @TrayIconData);
end;

procedure TForm1.TrayMessage(var Msg: TMessage);
begin
  case Msg.lParam of
    WM_LBUTTONDOWN:
    begin
      ShowMessage('hej');
      Form1.Visible := true;
    end;
    WM_RBUTTONDOWN:
    begin
      Form1.Visible := false;
    end;
  end;
end;



end.