KnowledgeBase Archive

An Archive of Early Microsoft KnowledgeBase Articles

View on GitHub

Q194612: FIX: AlwaysOnTop Property Always Returns .F. For TopLevel Forms

Article: Q194612
Product(s): Microsoft FoxPro
Version(s): WINDOWS:6.0
Operating System(s): 
Keyword(s): kbservicepack kbvfp600 kbvfp600bug kbVS600sp2 kbVS600SP1 kbVS600sp3fix
Last Modified: 16-JUN-1999

-------------------------------------------------------------------------------
The information in this article applies to:

- Microsoft Visual FoxPro for Windows, version 6.0 
-------------------------------------------------------------------------------

SYMPTOMS
========

You can use the AlwaysOnTop property of a Visual FoxPro form in conjunction with
a TopLevel form to create an application that prevents other windows from
covering the applications window. Changing the AlwaysOnTop property at run-time
changes the behavior of the form, but querying the property value always returns
.F. This behavior only exists when the ShowWindow property of the form is set to
2 - As TopLevel Form.

RESOLUTION
==========

You can use a custom property and an AlwaysOnTop Assign method to work around
this problem. The following code uses a custom form property called
AlwaysOnTop_Actual to store the actual setting of the AlwaysOnTop property of
the form. The value of this custom property changes in the AlwaysOnTop_Assign
method:

     PUBLIC ox
        ox = NewObject("test")
        ox.Show
        ?ox.AlwaysOnTop_Actual
        ox.AlwaysOnTop = .F.
        ?ox.AlwaysOnTop_Actual
        ox.AlwaysOnTop = .T.
        ?ox.AlwaysOnTop_Actual

     DEFINE CLASS test AS form
        ShowWindow = 2
        AlwaysOnTop = .T.
        AlwaysOnTop_Actual = .T.

        PROCEDURE AlwaysOnTop_Assign
           LPARAMETERS vNewVal
           This.AlwaysOnTop_Actual = vNewVal
           THIS.AlwaysOnTop = m.vNewVal
        ENDPROC

     ENDDEFINE

STATUS
======

Microsoft has confirmed this to be a bug in the Microsoft products listed at the
beginning of this article.

This bug was corrected in Visual Studio 6.0 Service Pack 3. For more information
about Visual Studio service packs, please see the following articles in the
Microsoft Knowledge Base:

  Q194022 INFO: Visual Studio 6.0 Service Packs, What, Where, Why

  Q194295 HOWTO: Tell That Visual Studio 6.0 Service Packs Are Installed

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

Steps to Reproduce Behavior
---------------------------

Run the following program code:

     PUBLIC ox
        ox = NewObject("test")
        ox.Show
        ?ox.AlwaysOnTop
        ox.AlwaysOnTop = .F.
        ?ox.AlwaysOnTop
        ox.AlwaysOnTop = .T.
        ?ox.AlwaysOnTop

     DEFINE CLASS test AS form
        ShowWindow = 2
        AlwaysOnTop = .T.
     ENDDEFINE

Note the querying the AlwaysOnTop property always returns .F.

Additional query words:

======================================================================
Keywords          : kbservicepack kbvfp600 kbvfp600bug kbVS600sp2 kbVS600SP1 kbVS600sp3fix 
Technology        : kbVFPsearch kbAudDeveloper kbVFP600
Version           : WINDOWS:6.0
Issue type        : kbbug
Solution Type     : kbfix

=============================================================================

THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES SO THE FOREGOING LIMITATION MAY NOT APPLY.