DOCUMENT:Q191083  07-AUG-1998  [vbwin]
TITLE   :BUG: IPF When Replacing Class Module with UserControl
PRODUCT :Microsoft Visual Basic for Windows
PROD/VER:WINDOWS:6.0
OPER/SYS:WINDOWS
KEYWORDS:kbVBp600bug kbIDE

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

 - Microsoft Visual Basic Learning, Professional, and Enterprise Editions
   for Windows, version 6.0
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SYMPTOMS
========

When replacing a Class module with a UserControl in an ActiveX Control
project that has Binary Compatibility set, an Invalid Page Fault (IPF) in
module VBA6.dll will occur.

STATUS
======

Microsoft has confirmed this to be a bug in the Microsoft products listed
at the beginning of this article. We are researching this bug and will post
new information here in the Microsoft Knowledge Base as it becomes
available.

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

Steps To Reproduce Behavior
---------------------------

1. Start a new ActiveX Control project in Visual Basic.

2. From the Project menu, click Add Class Module. Class1 is created.

3. Paste the following code into Class1:

      Public a As Class1

4. From the File menu, click Make Project1.ocx to compile the project.

5. Select Project1 Properties from the Project menu. From the Component tab
   choose Binary Compatibility.

6. Remove Class1.

7. Select Add User Control from the Project menu to create a new
   UserControl. UserControl2 is created.

8. Rename UserControl2 to Class1.

9. Paste the following code into Class1:

      Public a As Class1

10. Compile as Project2.ocx.

The following error occurs:

   VB caused an Invalid Page Fault in module VBA6.dll

Additional query words:
======================================================================
Keywords          : kbVBp600bug kbIDE
Version           : WINDOWS:6.0
Platform          : WINDOWS
Issue type        : kbbug
Solution Type     : kbpending

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Copyright Microsoft Corporation 1998.