BUG: Using an Add-In to Change the Name of a UserControl May Cause an Access Violation (285642)


The information in this article applies to:

  • Microsoft Visual Basic Professional Edition for Windows 6.0
  • Microsoft Visual Basic Enterprise Edition for Windows 6.0
This article was previously published under Q285642

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 that this is a bug in the Microsoft products that are 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.
Modification Type:MajorLast Reviewed:10/15/2002
Keywords:kbBug kbCtrl kbCtrlCreate kbDSupport kbIDEProject KB285642
©2002 Microsoft Corporation. All rights reserved.