Q131837: How to Return from an Event or Method

Article: Q131837
Product(s): Microsoft FoxPro
Version(s): WINDOWS:3.0
Operating System(s): 
Keyword(s): 
Last Modified: 15-FEB-2000

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The information in this article applies to:

- Microsoft Visual FoxPro for Windows, version 3.0 
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SUMMARY
=======

Sometimes, it may be necessary to exit or return from an event or method. This
article documents how to do this.

MORE INFORMATION
================

For this article, assume you have created a form that requires at least one
parameter. When the form is run without being passed a parameter, you'd like to
cancel the form and issue an error message.

In version 2.x, you could do this with the RETURN command. In Visual FoxPro, the
process is similar but somewhat different because you must return a value of
false from the INIT method. The following code shows how to handle this type of
a situation in the INIT code of a form.

    PARAMETER tnMyParm
    IF PARAMETERS() < 1 OR EMPTY(tnMyParm)
         * Display a message
         * Release the form
         RETURN .F.
    ENDIF
    More init code ...

Returning a value of false (.F.) prevents the creation the object (a form in this
case).

Additional query words: VFoxWin cancel event

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Keywords          :  
Technology        : kbVFPsearch kbAudDeveloper kbVFP300
Version           : WINDOWS:3.0

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