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Q221734: FIX: C0000005 Fatal Error With Invalid Property Name

Article: Q221734
Product(s): Microsoft FoxPro
Version(s): WINDOWS:6.0
Operating System(s): 
Keyword(s): kbservicepack kbAutomation kbOOP kbvfp600 kbvfp600bug kbVS600sp2fix kbVS600sp3fix kbGrp
Last Modified: 01-JUL-1999

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The information in this article applies to:

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

SYMPTOMS
========

Visual FoxPro terminates after displaying the following message:

  Fatal error: Exception code = C0000005

This behavior occurs when attempting to access an invalid property of an object.

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
---------------------------

The following steps require Microsoft Outlook to be installed on the computer
that is running Visual FoxPro.

1. Create a program named Getitems.prg using the following code:

     oTraverse = CREATEOBJECT("traverseoutlook")
     oTraverse.BeginTraverse

     DEFINE CLASS TraverseOutlook AS CUSTOM
        nNestingLevel = 0
        oOutLookObject = NULL
        olNameSpace = NULL

        PROCEDURE INIT
           WITH THIS
              .oOutLookObject = CREATEOBJECT("Outlook.Application")
              .olNameSpace = .oOutLookObject.GetNameSpace("MAPI")
           ENDWITH
        ENDPROC

        PROCEDURE BeginTraverse
           LOCAL folder
           FOR EACH folder ;
                 IN THIS.olNameSpace.Folders
              THIS.ProcessFolder(folder)
           NEXT folder
        ENDPROC

        PROCEDURE ProcessFolder(subfolder)
           * The valid property is THIS.nNestingLevel
           THIS.NestingLevel = THIS.NestingLevel + 1
           ?REPLICATE(CHR(9),THIS.NestingLevel-1),subfolder.NAME
           FOR EACH folder IN subfolder.Folders
              THIS.ProcessFolder(folder)
           NEXT folder
           FOR EACH ITEM IN subfolder.Items
              ?REPLICATE(CHR(9),THIS.NestingLevel),ITEM.subject
           NEXT ITEM
           THIS.NestingLevel = THIS.NestingLevel - 1
        ENDPROC
     ENDDEFINE

2. In the Command window, type the following:

DO GETITEMS

3. Visual FoxPro terminates after displaying the following error message:

  Fatal error: Exception code = C0000005

4. Replace the ProcessFolder (subfolder) code with the following code:

     THIS.nNestingLevel = THIS.nNestingLevel + 1
     ?REPLICATE(CHR(9),THIS.nNestingLevel-1),subfolder.NAME
     FOR EACH folder IN subfolder.Folders
        THIS.ProcessFolder(folder)
     NEXT folder
      FOR EACH ITEM IN subfolder.Items
        ?REPLICATE(CHR(9),THIS.nNestingLevel),ITEM.subject
     NEXT ITEM
     THIS.nNestingLevel = THIS.nNestingLevel - 1

5. In the Command window, type the following:

     DO GETITEMS

6. Note that Visual FoxPro outputs information to the screen as the Outlook
  folder hierarchy is traversed.

Additional query words: kbDSE

======================================================================
Keywords          : kbservicepack kbAutomation kbOOP kbvfp600 kbvfp600bug kbVS600sp2fix kbVS600sp3fix kbGrpDSFox kbVS600SP1fix 
Technology        : kbVFPsearch kbAudDeveloper kbVFP600
Version           : WINDOWS:6.0
Issue type        : kbbug
Solution Type     : kbfix

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

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