DOCUMENT:Q257524  27-JUL-2001  [vbwin]
TITLE   :FIX:Adding Items to ListView Control Results inIPF onWin95/98/Me
PRODUCT :Microsoft Visual Basic for Windows
PROD/VER::6.0
OPER/SYS:
KEYWORDS:kbCmnCtrls kbCtrl kbListView kbVBp kbVBp600bug kbOSWin95 kbOSWin98 kbGrpDSVB kbDSupport

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The information in this article applies to:

 - Microsoft Visual Basic Learning Edition for Windows, version 6.0, on platform(s):
    - the operating system: Microsoft Windows 95 
    - the operating system: Microsoft Windows 98 
    - the operating system: Microsoft Windows Millennium Edition 
 - Microsoft Visual Basic Professional Edition for Windows, version 6.0, on platform(s):
    - the operating system: Microsoft Windows 95 
    - the operating system: Microsoft Windows 98 
    - the operating system: Microsoft Windows Millennium Edition 
 - Microsoft Visual Basic Enterprise Edition for Windows, version 6.0, on platform(s):
    - the operating system: Microsoft Windows 95 
    - the operating system: Microsoft Windows 98 
    - the operating system: Microsoft Windows Millennium Edition 
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SYMPTOMS
========

An Invalid Page Fault is encountered when dynamically loading and populating
ListView controls within a control array.

RESOLUTION
==========

This problem can be solved in one of three ways:

 - Install Visual Studio Service Pack 4.
 - Dynamically load all ListView controls before adding ListItems collections to
   any of them.
 - Pre-load the ListView controls at design time instead of creating them
   dynamically.

STATUS
======

Microsoft has confirmed that this is a bug in the Microsoft products that are
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 following
article numbers 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

To download the latest Visual Studio service pack, visit the following Microsoft
Web site:

   http://msdn.microsoft.com/vstudio/downloads/updates.asp

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

This behavior occurs under the Microsoft Windows 95, Microsoft Windows 98 and
Microsoft Windows Me operating systems but does not occur under Microsoft
Windows NT or Microsoft Windows 2000.

By using a DoEvents command during the process of dynamically loading the
controls, you may prevent the error from occurring immediately. However, the
error still occurs when you terminate the application.

In addition, this problem does not occur if all ListView controls are loaded
before items are added to them or if the ListView controls are all loaded at
design time.

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

1. Create a new Standard EXE project. Form1 is created by default.

2. On the Project menu, select Components, check Microsoft Windows Common
   Controls 6.0, and then click OK.

3. Add a ListView control to Form1.

4. Set the Index property of the ListView control to 0.

5. Paste the following code into Form1's code window:

   Option Explicit

   Private Sub Form_Load()
      Dim i As Integer
      Dim j As Integer
      Dim objListItem As ListItem

      ' Set view to report
      ListView1(0).View = lvwReport
      
      ' Add some columns to listview
      ListView1(0).ColumnHeaders.Add , "col1", "col1"
      ListView1(0).ColumnHeaders.Add , "col2", "col2"
      ListView1(0).ColumnHeaders.Add , "col3", "col3"

      ' Load and populate total of 6 ListView controls
      For i = 0 To 5
         If i > 0 Then
            ' Create a new ListView control
            Load ListView1(i)
            
            ' Position and show the new control
            ListView1(i).Left = ListView1(i - 1).Left + 250
            ListView1(i).Top = ListView1(i - 1).Top + 250
            ListView1(i).Visible = True
         End If
           
         ' Add 10 data items to the listview just created
         For j = 1 To 10
            Set objListItem = ListView1(i).ListItems.Add(, , "data1-" & j)
            objListItem.SubItems(1) = "data2-" & j
            objListItem.SubItems(2) = "data3-" & j
            
            ' Set the tag property of the new ListItem
            objListItem.Tag = j
         Next j
      Next i
   End Sub

6. Run the program.

RESULT: An Invalid Page Fault occurs.

Additional query words: sp4 IPF GPF

======================================================================
Keywords          : kbCmnCtrls kbCtrl kbListView kbVBp kbVBp600bug kbOSWin95 kbOSWin98 kbGrpDSVB kbDSupport kbVS600sp4fix kbOSWinME kbVS600sp5fix 
Technology        : kbVBSearch kbAudDeveloper kbZNotKeyword6 kbZNotKeyword2
Version           : :6.0
Issue type        : kbbug
Solution Type     : kbfix

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