FIX: Crash with Watch on UserControl When Stop is Encountered

 Last reviewed: December 18, 1997
Article ID: Q171502
The information in this article applies to:
  • Microsoft Visual Basic Learning, Professional, and Enterprise Editions for Windows, version 5.0

SYMPTOMS

Visual Basic may crash when a Stop action or Breakpoint is encountered in the ReadProperties event of a UserControl.

CAUSE

The ReadProperties event occurs before a UserControl is completely loaded.

If a Runtime error, Stop statement, or Breakpoint is encountered during this time, and a Watch is set on a variable of the UserControl, Visual Basic may crash.

RESOLUTION

Install Visual Studio 97 Service Pack 2 (SP2) or do not use a Stop statement or Breakpoint in the ReadProperties event of a UserControl when a watch is set on a UserControl variable.

STATUS

Microsoft has confirmed this to be a bug in the Microsoft products listed at the beginning of this article. This bug has been fixed in Visual Studio 97 Service Pack 2.

For more information on the Visual Studio 97 Service Pack 2, please see the following article in the Microsoft Knowledge Base: 

   ARTICLE-ID: Q170365
   TITLE     : INFO: Visual Studio 97 Service Packs - What, Where, and Why
For a list of the Visual Basic 5.0 bugs that were fixed in the Visual Studio 97 Service Pack 2, please see the following article in the Microsoft Knowledge Base: 

   ARTICLE-ID: Q171554
   TITLE     : INFO: Visual Basic 5.0 Fixes in Visual Studio 97
               Service Pack 2

MORE INFORMATION

This may occur if you are running in a multi-UserControl environment and set a watch value to the UserControl.

Steps to Reproduce Behavior

  1. Start a new Standard EXE project in Visual Basic 5.0.

  2. Insert a UserControl into the project by selecting "Add User Control" from the Project menu. Place an instance of the UserControl on Form1.

  3. Paste the following code in the UserControl_Readproperties event: 

          Private Sub UserControl_ReadProperties(PropBag As PropertyBag)

             Stop
      End Sub


  4. Place a second instance of the UserControl on Form1.


  5. Add the following watches:

    

          Form1.UserControl11
      Form1.UserControl12

    

  6. Press the F5 key to execute the project.

 

Keywords          : vb5all VS97FixlistSP3 VS97FixlistSP2 VB5FixlistSP2
Version           : 5.0
Platform          : WINDOWS
Issue type        : kbbug
Solution Type     : kbfix kbservicepack


	
			
	















	






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








THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS
PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND.  MICROSOFT DISCLAIMS
ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES
OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.  IN NO
EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR
ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL,
CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF
MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE
POSSIBILITY OF SUCH DAMAGES.  SOME STATES DO NOT ALLOW THE EXCLUSION
OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES
SO THE FOREGOING LIMITATION MAY NOT APPLY.






	
	Last reviewed:  December 18, 1997
	

	© 1998 Microsoft Corporation. All rights reserved. Terms of Use.