Development Guide
Table Of Contents
- Chapter 1 Introducing FileMaker Pro Advanced
- Chapter 2 Creating database solutions
- Chapter 3 Customizing database solutions
- Chapter 4 Debugging, analyzing, and optimizing files
- Chapter 5 Developing third-party FileMaker plug-ins
- About external functions
- About the example plug-in
- Installing, enabling, and configuring the example plug-in
- Description of the FMExample plug-in’s external functions
- Using the example plug-in
- Customizing the plug-in example
- Requirements for writing external function plug-ins
- FileMaker messages sent to the plug-in
- Avoiding potential Mac OS X resource conflicts
- Providing documentation for your plug-in
- Appendix A Feature comparison of the runtime application with FileMaker Pro
- Index
20 FileMaker Pro Advanced Development Guide
Creating custom functions
Use the Custom Functions feature to create custom functions that can
be reused anywhere in the database file in which they are created.
Once formulas are written for the function, they don’t have to be
rewritten to be applied to other fields or used in other scripts.
You can maintain and edit custom functions and the formulas they
contain in one central location. Any change made to the custom
function will be copied to all instances where that custom function has
been used.
To create a custom function:
1. Choose File menu > Manage > Custom Functions.
2. In the Manage Custom Functions dialog box, click New.
3. In the Edit Custom Function dialog box, type a name for the
function and build a formula.
4. Click OK.
For more information about creating custom functions, see Help.
Function list
Formula box
Parameters list
Your custom parameters
appear in this space
View list (opened)
Edit Custom Function dialog box