O'Reilly logo

FileMaker® 8 Functions and Scripts Desk Reference by Bob Bowers, Steve Lane, Scott Love

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

Chapter 7. Custom Functions Primer

Custom functions are without a doubt one of the most powerful features in FileMaker; we cannot advocate their use strongly enough.

Simply described, custom functions become available in the calculation dialog as additional functions for use within expressions. They are snippets of code that, just as FileMaker’s pre-established functions do, accept parameters and produce output. One example might be

    fnCommission (unitPrice; quantity; discount)

This function would then presumably return a dollar amount based on some formula that multiplied unitPrice and quantity, subtracted a discount from the total, and then applied a percentage or some internal factoring to arrive as a sales commission.

Note that as a developer ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required