Developer’s Guide

Installing FileMaker Pro Developer Edition 1-5
Important FileMaker, Inc. does not provide technical support for
third-party plug-ins. Be sure to test your plug-ins carefully.
For more information on external function plug-ins, refer to EFP
Documentation.pdf:
Developer Edition CD\FileMaker Pro
APIs\External Function Plug-in\EFP Documentation.pdf.
Naming and registering your plug-in
Every external function plug-in name must begin with a unique three- to
five-character signature. The Full Example plug-in functions all share
the XPL signature, followed by the rest of the function name (for
example, Xpl-Version). In order to guarantee the uniqueness of your
signature, it’s important to register your plug-in with FileMaker, Inc. on
the FileMaker, Inc. web site (http://www.filemaker.com).
Note FileMaker, Inc. has reserved all external function plug-in names
beginning with “Web” or “FM”.
In Windows, each plug-in must use .fmx as the three-character
extension.
The Mac OS file type code should always be “FMXT”. The
four-character signature acts as the creator code. You should register
your creator code with Apple Computer, Inc. to ensure that it is unique.
Contact Apple Developer Support or visit their web site
(http://www.apple.com) for more information.
For information on naming and registering external function plug-ins,
refer to the EFP Documentation.pdf document in the External Function
Plug-in folder.
Preferences dialog box from example plug-in