DOCUMENT:Q285642  01-APR-2001  [vbwin]
TITLE   :BUG: Using Add-In to Change Name of UserControl May Cause AV
PRODUCT :Microsoft Visual Basic for Windows
PROD/VER::6.0
OPER/SYS:
KEYWORDS:kbCtrl kbCtrlCreate kbVBp kbVBp600bug kbIDEProject kbGrpDSVB kbDSupport

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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 use an add-in to change the name of a UserControl, an access violation
(AV) occurs. The error message is similar to the following:

   VB6.EXE - Application Error
   The instruction at "0x004075a9" referenced memory at "0x0000000c". The memory
   could not be "read".

Modifying the name of Projects, Modules, and Forms with an add-in does not cause
an Access Violation.

STATUS
======

Microsoft has confirmed this to be a bug in the Microsoft products listed at the
beginning of this article.

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

This appears to be an issue only when you load a project from a file and then
try to change the name of a UserControl in that project. The error message does
not occur if you create a new ActiveX Control Project and then change the name
of the UserControl.

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

1. Create a new Visual Basic add-in project.

2. Open the design window for the form frmAddin and replace the current code for
   the click event of the OKButton with the following:

   Dim oUserCtl As VBComponent
   Dim oProj As VBProject

   VBInstance.VBProjects.AddFromFile VBInstance.ActiveVBProject.FileName, True
   Set oProj = VBInstance.VBProjects.Item("Project1")
   Set oUserCtl = oProj.VBComponents("Usercontrol1")
   ' the following line causes the Access Violation:
   oUserCtl.Name = "CoolName"
   Unload Me

3. Compile the add-in DLL.

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

5. On the File menu, choose Save Project, and then save the project files to a
   folder.

6. If it is not already loaded, load the add-in by using Add-In Manager. The
   name of the add-in should be My Addin.

7. On the Add-Ins menu, select My Addin.

8. Click OK, and note that an access violation occurs.

Additional query words: addin User ctl ctrl

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Keywords          : kbCtrl kbCtrlCreate kbVBp kbVBp600bug kbIDEProject kbGrpDSVB kbDSupport 
Technology        : kbVBSearch kbAudDeveloper kbZNotKeyword6 kbZNotKeyword2 kbVB600Search kbVBA600 kbVB600
Version           : :6.0
Issue type        : kbbug
Solution Type     : kbpending

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