Crystal Reports for Eclipse Designer Guide

Advantages

Consider these advantages when deciding if you want to use a custom function:
  • Custom functions can replace sections of formula logic common to many different formulas that, in turn, may be used in many different reports.
  • Custom function can reduce the need for your users to write formulas themselves; you can provide them with the formula logic they need in a custom function.
  • Custom functions can have arguments, which makes them flexible.
  • You can define help text and default argument values for custom functions, which makes it easier for your users to use them.
  • Custom functions, unlike User Function Libraries (UFLs) to which they are related, are saved as part of the report file (.rpt) and don't have any external dependencies.
  • Custom functions are stateless; the same input always yields the same result.



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