PROBLEM TO BE SOLVED: To provide a value addition program for adding value to print data output from an existent application, and the like, the value addition program being capable of easily adding various kinds of value without modifying a program of the existent application.;SOLUTION: A value addition program, which causes a computer having one or more communication ports for executing predetermined processing through an application to execute processing of adding value to print data output from the application, causes the computer to execute: a data acquiring step for acquiring print data in an OS kernel layer prior to receiving the print data in a communication port; and a data processing step for performing processing of adding or deleting print contents on the acquired print data on the basis of previously registered information in an application layer and outputting the data after the processing to a predetermined communication port.;COPYRIGHT: (C)2012,JPO&INPIT
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