Crystal Reports for Eclipse Designer Guide

User Function Libraries in formulas

Crystal Reports lets developers create User Function Libraries (UFLs) that are recognized by the Formula Editor. A UFL is a library of functions that is created by a developer to address a specific need.
Crystal Reports lets you extend the formula language with your own Java functions, and then package them in a User Function Library.
When users create a report in the embedded Crystal Reports Designer, they often create formula fields to use in the report. These formula fields consist of variables and functions provided by the Crystal Reports Designer. Although a large collection of functions are available, sometimes users need a customized function.



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