Perform AppleScript (OS X)
Sends AppleScript commands to another application.
Perform AppleScript [“<applescript text>”]
Click Specify to display the “Perform AppleScript” Options dialog box, where you can set the following options.
Calculated AppleScript lets you create a calculation to use as the AppleScript text.
Native AppleScript lets you manually enter the text of an AppleScript (up to 30000 characters). Indenting of repeat loops and conditional statements is not supported.
Where the script step runs 
FileMaker Pro 
FileMaker Server scheduled script 
FileMaker Go 
Custom Web Publishing 
FileMaker WebDirect 
Runtime solution 
Originated in 
FileMaker Pro 6.0 or earlier
You can create a calculation to generate the AppleScript commands to be sent, or you can type the commands directly into the Native AppleScript text area.
For calculated scripts and scripts stored in FileMaker Pro fields, the AppleScript commands are compiled each time the script is performed. If you type the script into the Native AppleScript text area, then FileMaker Pro compiles the script and detects any scripting or system errors. (The script is recompiled whenever it's edited.)
Note  Because AppleScript is an OS X feature, if you run a script containing a Perform AppleScript script step on a Windows computer, the script step is ignored. (An error code is generated, which can be captured with the Get(LastError) function.)
Tips on usage
FileMaker Pro can use the Perform AppleScript script step to send Apple events to itself or to FileMaker Pro software running on other machines.
Perform AppleScript ["tell application "My Applet" to doMyRoutine()"]
Example 1 
Opens the Documents folder of the current OS X User.
Perform AppleScript ["tell application "Finder" (*enter line break*) activate (*enter line break*) set x to path to documents folder (*enter line break*) open x (*enter line break*) end tell"]
Example 2 
Sets the bounds of the Documents window to the specified size. The Documents folder must be open before this script runs.
Perform AppleScript ["tell application "Finder" to set bounds of window "Documents" to {170, 70, 1000, 600}"]
Example 3 
Calculates and performs the AppleScript to install a network printer. "\" tells FileMaker Pro to recognize the symbol that follows as a character and not as a calculation operator.
Perform AppleScript ["do shell script \"lpadmin -p " & Printers::Name & " -E -v lpd://" & Printers::IP Address & " -P /Library/Printers/PPDs/Contents/Resources/" & Substitute ( Printers::Driver Name ; " " ; "\\\ " ) & ".gz -D \\\"" & Printers::Description & "\\\"\""]
Related topics 
Script steps reference (alphabetical list)
Script steps reference (category list)