KnowledgeBase Archive

An Archive of Early Microsoft KnowledgeBase Articles

View on GitHub

Q129906: PRB: Listbox Not Properly Redrawn in Design Mode

Article: Q129906
Product(s): Microsoft FoxPro
Version(s): WINDOWS:3.0
Operating System(s): 
Keyword(s): kbcode
Last Modified: 10-FEB-2000

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

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

SYMPTOMS
========

When a list box is resized in Design Mode, black boxes that correspond to the
handles are left on the Form. This occurs when the list is resized in a program
(for example, when you are coding a Builder). The list is properly refreshed
when you resize it in the Form Designer.

CAUSE
=====

When modifying the size of an object outside the Form Designer, Visual FoxPro
does not automatically manage the position of the handles in the corners.
However a new function, SYS(104), has been included in the product. It switches
the handles ON and OFF at design time.

STATUS
======

This behavior is by design.

RESOLUTION
==========

If you are developing a builder or a wizard that accesses objects outside of the
Form Designer at design time, use the SYS(104) function to toggle the grippers
on and off. For example, type the following when you are ready to move the
control:

     ? SYS(104)

Use the SYS(104) function in the same fashion when you are ready to redraw the
handles after the control has been repositioned.

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

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

1. Create a Form.

2. Place a list box on the form. Leave the focus on the list box.

3. From the Command window, type the following code:

     nSelect=ASELECT(atest) && Places list object reference into an array.
     ?SYS(104)              && Handles are toggled off.
     Atest(1).Top=Atest(1).top+45 && moves the list 45 pixels down
     ? SYS(104)             && Handles are toggled on.
     Atest(1).Top=Atest(1).Top+45  &&List is moved and leaves black marks.


Additional query words: vFoxwin 3.00

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

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

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.