Overview of User-Defined Functions in Delphi

The Crystal Reports Formula Editor and formula language are powerful tools, enabling you to do a wide variety of report-related tasks easily and efficiently. The formula language is expandable as well. That is, while it already includes a large selection of useful functions, it also comes with the ability to accept new functions that you define to meet your needs.

User Defined Functions that are recognized by the Crystal Reports Formula Editor can be created in a Dynamic Link Library or, for 32-bit environments, in an Automation Server. This section demonstrates how to create User Defined functions in an Automation Server using Borland Delphi 3.0 (and later versions). For information on how to create User Defined Functions in a Dynamic Link Library using the C or C++ programming language, see Programming User-Defined Functions in C. For information on how to create User Defined Functions in an Automation Server using Visual Basic, see Programming User-Defined Functions in Visual Basic.



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