FIX: ReDim Preserve on Array of UDTs May Cause Crash

• Microsoft Visual Basic Learning, Professional, and Enterprise Editions for Windows, version 6.0

SYMPTOMS

When attempting to use Redim Preserve on an array of User Defined Types within a public object, a fatal error in OleAut32.dll might occur.

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

1. Start a new Standard EXE project in Visual Basic. Form1 is created by default.



2. Select Add Project from the File menu to add an ActiveX Control project.



3. Paste the following code into the General Declarations section of the UserControl:




Public Type SomeType
    SomeTest As String
End Type

Private UDTSomething() As SomeType

Public Sub ReDimUDT()
    ReDim Preserve UDTSomething(0)
End Sub 

4. Close the ActiveX Control designer.



5. Add an instance of the UserControl to Form1.



6. Add a CommandButton to Form1.



7. Paste the following code into the module of Form1:




Private Sub Command1_Click()
    UserControl11.ReDimUDT
End Sub 

8. Run the project and click the CommandButton.


You might see a fatal error in OleAut32.dll.

Additional query words:

Keywords          : kbActiveX kbVBp600bug kbGrpVB kbVS600sp3fix 
Version           : WINDOWS:6.0
Platform          : WINDOWS 
Issue type        : kbbug 

Last Reviewed: May 21, 1999