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Q113811: PRB: TAB Key Does Not Trigger List Box’s VALID Clause

Article: Q113811
Product(s): Microsoft FoxPro
Version(s): MACINTOSH:2.5x,2.6a; MS-DOS:2.0,2.5x,2.6x; WINDOWS:2.5x,2.6x,3.0
Operating System(s): 
Keyword(s): 
Last Modified: 09-FEB-2000

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The information in this article applies to:

- Microsoft Visual FoxPro for Windows, version 3.0 
- Microsoft FoxPro for MS-DOS, versions 2.0, 2.5x, 2.6x 
- Microsoft FoxPro for Windows, versions 2.5x, 2.6x 
- Microsoft FoxPro for Macintosh, versions 2.5x, 2.6a 
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SYMPTOMS
========

Contrary to expectation, the TAB key does not trigger a list box's VALID clause.

CAUSE
=====

Unlike most screen GET objects, in order for its VALID clause to be executed, a
list box requires a selection be made with a press of the ENTER key or a
double-click of the mouse. Even though positioning the highlight bar on a
particular entry in a list box and pressing the TAB key updates the list-box
variable's value, the VALID clause is ignored.

STATUS
======

This behavior is by design.

REFERENCES
==========

"Language Reference," version 2.5, page L3-77
"Commands & Functions," version 2.0, page C3-50
The "@ ... GET - List Boxes Command" topic of Visual FoxPro online Help,

Additional query words: VFoxWin FoxMac FoxDos FoxWin 2.50 2.50a 2.50b 2.50c 2.60 listbox

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Keywords          :  
Technology        : kbHWMAC kbOSMAC kbVFPsearch kbAudDeveloper kbFoxproSearch kbZNotKeyword3 kbFoxPro260aMac kbFoxPro200DOS kbVFP300
Version           : MACINTOSH:2.5x,2.6a; MS-DOS:2.0,2.5x,2.6x; WINDOWS:2.5x,2.6x,3.0

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