A method, apparatus, and article of manufacture for protecting a shelled computer program with a startup code featuring multiple-route execution. The coating composition according to the present invention comprises a polyalkylsilazane compound, an acetoxysilane compound, an organic solvent, and, if necessary, a pore forming material. Therefore, when the voltage of a battery that supplies electric power to the electric actuator is below a level needed to drive the electric actuator, the door opens. The flow passage area of the communication passage is increased as the distance from the air bleed port increases in the circumferential direction of the circular space. The middle passageway contains all the physical dimensions necessary to control the waveguide performance, the most important being the height H and the width D, whose ratio controls the wave front output curvature. Upon finding the scan slot, the instruction simulation function performs an instruction simulation operation in accordance with the control information in the corresponding operand slot, then returns control to the user program.