⤷ Close application when lose focus

This example shows, how to close application, which is losing focus and becoming deactivated. Use onDeactivate event of TApplication class.

procedure TForm1.CloseApp(Sender: TObject);
begin
  Close;
end;

procedure TForm1.FormCreate(Sender: TObject);
begin
  Application.OnDeactivate:=CloseApp;
end;
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