KnowledgeBase Archive

An Archive of Early Microsoft KnowledgeBase Articles

View on GitHub

Q193087: BUG: Cannot Run a Compiled ActiveX DLL From IE

Article: Q193087
Product(s): Microsoft Visual Basic for Windows
Version(s): WINDOWS:4.0,5.0,5.5,6.0
Operating System(s): 
Keyword(s): kbwizard kbAddIn kbIE400bug kbVBp kbVBp500bug kbVBp600bug kbGrpDSVB kbDSupport kbie550b
Last Modified: 20-JUL-2001

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

- Microsoft Visual Basic Learning Edition for Windows, versions 5.0, 6.0 
- Microsoft Visual Basic Professional Edition for Windows, versions 5.0, 6.0 
- Microsoft Visual Basic Enterprise Edition for Windows, versions 5.0, 6.0 
- Microsoft Internet Explorer (Programming) versions 4.0, 5.5 
-------------------------------------------------------------------------------

SYMPTOMS
========

Internet Explorer (IE) fails to load an ActiveX DLL that is compiled in
Microsoft Visual Basic 5.0 or 6.0.

CAUSE
=====

The Class_Initialize event is not fired correctly.

RESOLUTION
==========

In Visual Basic 6.0, run the DLL project in the Visual Basic IDE (Integrated
Development Environment) before loading it in IE to correct this problem.

There is no resolution for a Visual Basic 5.0 project.

STATUS
======

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

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

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

1. Create a new ActiveX DLL project in Visual Basic. Class1 is created by
  default.

2. Add a new form (Form1) to the project.

3. Paste the following code into Class1:

        Option Explicit

        Private myform As Form1

        Private Sub Class_Initialize()
           Set myform = New Form1
           myform.Visible = True
        End Sub

        Private Sub Class_Terminate()
           Set myform = Nothing
        End Sub

4. Save the project.

5. Compile the project by selecting Make Project1.dll from the File menu.

6. Select Add-In Manager under Add-Ins and check Visual Basic 6.0 Package and
  Deployment Wizard (PDW) to load it.

7. Start the PDW by selecting it from the Add-Ins menu.

8. Select Package. In the Package Type screen, select Internet Package and click
  Next. Follow the PDW to completion. The PDW will create a HTM file for your
  project in your desired Package directory.

9. Press the F5 key to run the project in the IDE. Select "Wait for component to
  be created" and click OK.

10. Launch Internet Explorer and browse to the HTM file created in step 8. The
  form shows up correctly.

11. Close IE and stop the Visual Basic project from running in the IDE.

12. Reopen IE and browse to the HTM file again. The page loads without error,
  but the form is not created.

Additional query words:

======================================================================
Keywords          : kbwizard kbAddIn kbIE400bug kbVBp kbVBp500bug kbVBp600bug kbGrpDSVB kbDSupport kbie550bug 
Technology        : kbVBSearch kbIEsearch kbAudDeveloper kbZNotKeyword6 kbSDKIESearch kbZNotKeyword2 kbVB500Search kbVB600Search kbVB500 kbVB600 kbSDKIE400 kbSDKIE550 kbIE550Search
Version           : WINDOWS:4.0,5.0,5.5,6.0
Issue type        : kbbug
Solution Type     : kbpending

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

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.