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Q238945: FIX: Repeatedly Manipulating Data in Edit Box Causes Error Msg

Article: Q238945
Product(s): Microsoft FoxPro
Version(s): 5.0,5.0a,6.0
Operating System(s): 
Keyword(s): kberrmsg kbContainer kbCtrl kbvfp500aBUG kbvfp600bug kbXBase kbGrpDSFox kbDSupport kbVS
Last Modified: 26-JUL-2001

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The information in this article applies to:

- Microsoft Visual FoxPro for Windows, versions 5.0, 5.0a, 6.0 
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SYMPTOMS
========

After editing a large amount of data within an Editbox object, Visual FoxPro 6.0
produces the following error:

  Fatal error: Exception code=C0000005

In Visual FoxPro 5.0x running under Windows NT 4.0, the following Dr. Watson
message appears:

  An application error has occurred and an application log is being generated.
  VFP.exe
  Exception: access violation:(0x0000005),Address: <memory address>

Visual FoxPro 5.0x running on Windows 98 produces the following error:

  This program has performed an illegal operation and will be shut down.

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 the latest service pack for
Visual Studio 6.0.

For additional information about Visual Studio service packs, click the article
numbers below to view the articles in the Microsoft Knowledge Base:

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

  Q194295 HOWTO: Tell That a Visual Studio Service Pack Is Installed

You can download the latest Visual Studio service pack from the following
Microsoft Web site:

  Visual Studio Product Updates
  (http://msdn.microsoft.com/vstudio/downloads/updates.asp)


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

This error normally occurs while copying, pasting, and deleting large amounts of
data manually. The code below, which automates the process, produces the same
results.

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

1. Paste the following code into a program file:

  CLEAR
  CLEAR all
  _screen.addobject('edt1','editbox')
  _screen.edt1.width = 360
  _screen.edt1.visible = .t.
  _screen.EDT1.value = '12345678901234567890123456789012345678901234'
  _screen.edt1.setfocus()
  KEYBOARD '{ctrl+a}{ctrl+c}{END}{ctrl+v}{ctrl+v}{ctrl+v}{ctrl+v}'+ ;
  '{ctrl+v}{ctrl+v}{ctrl+v}{ctrl+v}{ctrl+v}{ctrl+v}{ctrl+v}' + ;
  '{ctrl+v}{ctrl+v}{ctrl+v}{ctrl+v}{ctrl+v}{ctrl+v}{ctrl+v}{ctrl+v}'
  KEYBOARD '{home}{shift+uparrow}{shift+uparrow}{del}{shift+end}{home}'
  KEYBOARD '{home}{shift+uparrow}{shift+uparrow}{backspace}{shift+end}{home}'

2. Close the Command window, but leave the program open.

3. Run the program by pressing the CTRL+E key combination.

One of the errors mentioned in the SYMPTOMS section above occurs.

Additional query words: sp4

======================================================================
Keywords          : kberrmsg kbContainer kbCtrl kbvfp500aBUG kbvfp600bug kbXBase kbGrpDSFox kbDSupport kbVS600sp4fix kbVS600sp5fix 
Technology        : kbVFPsearch kbAudDeveloper kbVFP500 kbVFP600 kbVFP500a
Version           : :5.0,5.0a,6.0
Issue type        : kbbug
Solution Type     : kbfix

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