[keyboy]

Para que no aparezca en la barra de tareas puedes modificar el archivo dpr así:

 program Project1;
 
 uses
 	Windows,
 	Forms,
 	Unit1 in 'Unit1.pas' {Form1};
 
 {$R *.res}
 
 var
 	Style: Integer;
 
 begin
 	Style := GetWindowLong(Application.Handle, GWL_EXSTYLE);
 	Style := Style or WS_EX_TOOLWINDOW;
 	SetWindowLong(Application.Handle, GWL_EXSTYLE, Style);
 
 	Application.Initialize;
 	Application.CreateForm(TForm1, Form1);
 	Application.Run;
 end.

Bye