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Q190459: BUG: Restricted Function or Interface Error with IDispatch

Article: Q190459
Product(s): Microsoft Visual Basic for Windows
Version(s): 
Operating System(s): 
Keyword(s): kbGrpDSVB
Last Modified: 11-JAN-2001

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The information in this article applies to:

- Microsoft Visual Basic Learning Edition for Windows, version 6.0 
- 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 an ActiveX DLL project is set to be binary compatible, and a class module has
the name "IDispatch," then any changes made to the module will generate the
following error:

  Function or interface marked as restricted, or the function uses an
  Automation type not supported in Visual Basic.

The above error occurs after the expected Incompatibility error message. However,
this error will not occur if neither the project's version compatibility is
binary nor the class module name is "IDispatch."

STATUS
======

Microsoft has confirmed this to be a bug in the Microsoft products listed at the
beginning of this article. We are researching this bug and will post new
information here in the Microsoft Knowledge Base as it becomes available.

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

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

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

2. Add a new Class to the project and name it "IDispatch."

3. Paste the following code in IDispatch's code window:

        Public Sub AddRef()

        End Sub

4. Paste the following code in Class1's code window:

        Implements IDispatch

        Private Sub IDispatch_AddRef()
        End Sub

5. On the File menu, click Make Project1.dll.

6. On the Project menu, click Project1 Properties, and then click the Component
  tab.

7. In the Version Compatibility Frame, click Binary Compatibility, and then
  click OK.

8. Comment out the code in "IDispatch" class module.

9. Press the F5 key to run the project, and then click OK to close the
  Incompatibility error message. Note that the following error occurs:

  Function or Interface marked as restricted, or the function uses an
  Automation type not supported in Visual Basic.

Additional query words: kbdss kbDSupport kbVBp kbVBp600bug kbCompiler

======================================================================
Keywords          : kbGrpDSVB 
Technology        : kbVBSearch kbAudDeveloper kbZNotKeyword6 kbZNotKeyword2 kbVB600Search kbVBA600 kbVB600
Issue type        : kbbug

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