Fazendo sua aplicação executar sem apresentar o form principal

Program Project1;
uses
Forms, WINDOWS,
Unit1 in 'Unit1.pas' {Form1};
{$R *.RES}
begin
Application.Initialize;
Application.ShowMainForm := False; <==== aqui.
Application.CreateForm(TForm1, Form1);
Showwindow(application.handle,sw_hide); <== Este oculta da TaskBar
Application.Run;
end.