A printer driver includes a plurality of modules, an interface unit that accepts the addition of plug-in including one or more additional modules for realizing a predetermined function, and a storage unit that stores setting information that defines information related to a partial process for realizing the predetermined function of the plug-in. The plurality of modules performs a process that is the partial process for realizing the predetermined function and cannot be realized in the additional modules included in the plug-in in accordance with the setting information.