DOCUMENT:Q257660  11-SEP-2001  [vbwin]
TITLE   :FIX: Setting Printer Object Reference to Nothing Causes IPF
PRODUCT :Microsoft Visual Basic for Windows
PROD/VER:WINDOWS:6.0
OPER/SYS:
KEYWORDS:kbprint kbPrinting kbVBp kbVBp600bug kbGrpDSVB kbDSupport kbVS600sp4fix kbVS600sp5fix

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

 - Microsoft Visual Basic Professional Edition for Windows, version 6.0 
 - Microsoft Visual Basic Enterprise Edition for Windows, version 6.0 
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SYMPTOMS
========

If you have an array of objects that are of type Printer and you set them to the
objects of the Printers collection, an Invalid Page Fault occurs when you set
them to nothing.

RESOLUTION
==========

To resolve this problem, install the latest service pack for Visual Studio 6.0.

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

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

1. On Microsoft Windows 95 or Microsoft Windows 98, create a new Standard EXE
   project in Visual Basic. Form1 is created by default.

2. Place a CommandButton on Form1.

3. Paste the following code into the code window of Form1:

   Private Sub command1_Click()
     Dim i As Long
     Dim objPrinter(200) As Printer
     For i = 0 To 200
         Set objPrinter(i) = Printers(0)
     Next
     For i = 0 To 200
         Set objPrinter(i) = Nothing
         Debug.Print i
     Next
   End Sub

4. Press the F5 key to run the program.

5. Click on Command1 and note that an Invalid Page Fault occurs.

Additional query words: sp4

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Keywords          : kbprint kbPrinting kbVBp kbVBp600bug kbGrpDSVB kbDSupport kbVS600sp4fix kbVS600sp5fix 
Technology        : kbVBSearch kbAudDeveloper kbZNotKeyword6 kbZNotKeyword2 kbVB600Search kbVB600
Version           : WINDOWS:6.0
Issue type        : kbbug
Solution Type     : kbfix

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Copyright Microsoft Corporation 2001.