(i) Trayicon과 VCL Application Event 예제

http://docwiki.embarcadero.com/CodeExamples/Rio/en/TTrayIcon_(Delphi)

TTrayIcon (Delphi) - RAD Studio Code Examples

This example uses a tray icon and an application events component on a form.

When the application runs, it loads the tray icon, the icons displayed when it is animated, and it also sets up a hint balloon.  When you minimize the window, the form is hidden, a hint balloon shows up, and the tray icon is displayed and animated.  Double-clicking the system tray icon restores the window.

--
procedure TForm1.ApplicationEvents1Minimize(Sender: TObject);
begin
  { Hide the window and set its state variable to wsMinimized. }
  Hide();
  WindowState := wsMinimized;

  { Show the animated tray icon and also a hint balloon. }
  TrayIcon1.Visible := True;
  TrayIcon1.Animate := True;
  TrayIcon1.ShowBalloonHint;
end;

--
procedure TForm1.FormCreate(Sender: TObject);
var
  MyIcon : TIcon;
begin
  { Load the tray icons. }
  TrayIcon1.Icons := TImageList.Create(Self);
  MyIcon := TIcon.Create;
  MyIcon.LoadFromFile('icons/earth1.ico');
  TrayIcon1.Icon.Assign(MyIcon);
  TrayIcon1.Icons.AddIcon(MyIcon);

  MyIcon.LoadFromFile('icons/earth2.ico');
  TrayIcon1.Icons.AddIcon(MyIcon);
  MyIcon.LoadFromFile('icons/earth3.ico');
  TrayIcon1.Icons.AddIcon(MyIcon);
  MyIcon.LoadFromFile('icons/earth4.ico');
  TrayIcon1.Icons.AddIcon(MyIcon);

  { Set up a hint message and the animation interval. }
  TrayIcon1.Hint := 'Hello World!';
  TrayIcon1.AnimateInterval := 200;

  { Set up a hint balloon. }
  TrayIcon1.BalloonTitle := 'Restoring the window.';
  TrayIcon1.BalloonHint :=
    'Double click the system tray icon to restore the window.';
  TrayIcon1.BalloonFlags := bfInfo;
end;

--
procedure TForm1.TrayIcon1DblClick(Sender: TObject);
begin
  
  { Hide the tray icon and show the window,
  setting its state property to wsNormal. }
  TrayIcon1.Visible := False;
  Show();
  WindowState := wsNormal;
  Application.BringToFront();
end;