uses
  System.SysUtils, System.Types, System.UITypes, System.Classes, System.Variants,  
  FMX.Types, FMX.Controls, FMX.Forms, FMX.Graphics, FMX.Dialogs,  
  PK.TrayIcon; // <- Add

type
  TForm1 = class(TForm)
    procedure FormCreate(Sender: TObject);
  private
    FTrayIcon: TTrayIcon;
  public
  end;

implementation

procedure TForm1.FormCreate(Sender: TObject);
var
  Bmp: TBitmap;
begin
  // Generate TaskTray Icon library
  FTrayIcon := TTrayIcon.Create;

  // Event when the icon itself is clicked (Windows Only)
  FTrayIcon.RegisterOnClick(TrayIconClickHandler);
  FTrayIcon.RegisterOnDblClick(TrayIconClickHandler);

  // Menu setting
  FTrayIcon.AddMenu('MenuItem1', MenuClickedHandler);
  FTrayIcon.AddMenu('MenuItem2', MenuClickedHandler);
  FTrayIcon.AddMenu('-', nil);
  FTrayIcon.AddMenu('MenuItem3', MenuClickedHandler);

  // Icon registration
  // An icon is an instance of TBitmap. Here we are extracting from ImageList
  // Bmp := ImageList1.Bitmap(TSizeF.Create(24, 24), 0);
  // FTrayIcon.RegisterIcon('Normal', Bmp);   

  // Bmp := ImageList1.Bitmap(TSizeF.Create(24, 24), 1);
  // FTrayIcon.RegisterIcon('Error', Bmp);   

  // Specify the image to use (Please note that it is not displayed unless specified!)
  // FTrayIcon.ChangeIcon('Normal', 'HintText'); 

  // Displayed in TaskTray / StatusBar
  FTrayIcon.Apply('APPNAME');
end;

procedure TForm1.FormDestroy(Sender: TObject);
begin
  FTrayIcon.DisposeOf;
end;

procedure TForm1.MenuClickedHandler(Sender: TObject);
begin
  ShowMessage('The menu was clicked!');
end;

procedure TForm1.TrayIconClickHandler(Sender: TObject);
begin
  ShowMessage('TaskTray icon was clicked!');
end;