Article ID: 108622
Article Last Modified on 10/15/2003
APPLIES TO
- Microsoft Visual FoxPro 3.0b for Macintosh
- Microsoft FoxPro 2.5b for Macintosh
This article was previously published under Q108622
SUMMARY
The AppleScript language supports a RETURN statement that allows the author of a script to send a result back to the calling procedure. The calling procedure can be a FoxPro program, command, or procedure. Examples are provided below.
NOTE: AppleScript is manufactured by a vendor independent of Microsoft; we make no warranty, implied or otherwise, regarding this product's performance or reliability.
MORE INFORMATION
A script, which is a series of one or more commands supported by the AppleScript language, is analogous to a procedure written in Microsoft FoxPro or some other high-level language. Like procedures, a script can communicate with a calling program by returning a value to it. To run a script from within Microsoft FoxPro for Macintosh, use the following command syntax:
RUNSCRIPT <AppleScript> [TO <variable> | <field>]
If the script terminates with a RETURN statement, that value is returned to FoxPro and stored in the optional parameter to the RUNSCRIPT command.
The following example is an elementary AppleScript script that simply returns a Boolean, or logical, value:
return TRUE
The following example illustrates how FoxPro for Macintosh can store a value to a variable named retVal from an AppleScript script named MyScript:
RUNSCRIPT HD:Scripts:MyScript TO retVal
Although AppleScript supports a variety of extended types, or classes, such as lists, records, and aliases, FoxPro transforms them into simple character expressions when storing them.
Since only a single value can be returned from an AppleScript script and FoxPro for Macintosh does not support the passing of parameters to an AppleScript script, a character expression delimited with commas or some other value is recommended. Since AppleScript supports the list as a standard class, it makes sense to take advantage of it to build a list of return values. For example, the following AppleScript returns multiple values to the calling program by building a list object:
set theList to {"First"}<BR/>
set theList to theList & "Second"<BR/>
return theList
If you save the script, name it MyScript2, and invoke it issuing the following command in the FoxPro Command window:
RUNSCRIPT MyScript2 TO retVal
The list is returned to FoxPro as a character string delimited with commas. In this case, the character expression "First, Last" is returned, and the individual values can be returned using FoxPro's arsenal of string- manipulation functions such as SUBSTR() and AT(). The following FoxPro code snippet extracts the elements from retVal and stores the individual values to new variables:
var1 = SUBSTR(retVal,1,AT(',',retVal)-1)
var2 = SUBSTR(retVAL,AT(',',retVal)+3)
For more information about AppleScript, including a detailed explanation of the language and its supported types, see the "AppleScript Developer's Kit" from Apple Computer.
Additional query words: vFoxMac FoxMac
Keywords: kb3rdparty KB108622
