Developer’s Guide

Understanding external function plug-ins 12-5
Dialog box that appears when you
configure the example plug-in
4. Click OK to use the default format, or type a new format. The “#”
symbols are replaced by numbers. All other text in the format string
is retained as is.
5. Click Done to close the Application Preferences dialog box.
6. In FileMaker Pro, choose File menu > Define Fields.
7. Type a name for a new calculation field in the Field Name box.
8. For Type, select Calculation, and click Create.
9. In the Specify Calculation dialog box, choose External Functions
from the View pop-up menu.
10. Double-click an external function in the list that begins with the
function prefix "Xpl" to add it to the formula box.
Note The name of the External Function FMExample will show in
bold and the specific functions will be underneath that.
All external function calls require the name of the external function to
call and the function’s parameter value, even if the value is null (““).
11. Replace the word “parameter” with the required parameter for
the function. If no parameter is required, type two double-quotes
(““).
12. Continue to build the formula as desired and click OK when
you’re done.