During recording with an optical disk apparatus, an objective lens is moved toward the inner circumference and outer circumference of an optical disk in the radial direction thereof and also moved upward and downward, and the quantity of reflected light is measured at that time. A method of making a reservoir and a family of reservoirs and incorporating them into an electrotransport system is disclosed. Upon loading of a new method during execution of the target application, the system identifies methods in the target application that become reachable from the root method through the new method. Further, the call can be provided by an application that references the scripting language based framework. The dielectric film is formed of SiO2 or Al2O3.