DOCUMENT:Q190078  22-JUN-2001  [vbwin]
TITLE   :BUG: Error "[[BadImplementsRefInCompatLib]]" When You Recompile
PRODUCT :Microsoft Visual Basic for Windows
PROD/VER::6.0
OPER/SYS:
KEYWORDS:kbActiveX kbCompiler kbCOMt kbVBp kbVBp600bug 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
========

A binary compatible server implements an interface from a dynamic-link library
(DLL) (which defines interfaces), and this DLL is recompiled as project
compatible so that its interface globally unique identifier (GUID) is changed.
However, when you recompile the server that implements this interface, you
receive the following error message:

   [[BadImplementsReflnCompatLib]]

RESOLUTION
==========

Interfaces must be defined and locked before they can be implemented in other
components. Thus, make sure that you compile the DLL that defines interfaces as
binary compatible (to maintain the interface GUIDs) and not project compatible
to avoid the "[[BadImplementsReflnCompatLib]]" error message.

STATUS
======

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

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

This is a bug because it displays the "[[BadImplementsReflnCompatLib]]" error
message instead of the following error message:

   The binary compatibility DLL or EXE contains an implements type whose
   definition cannot be found.

If you click Help in the [[BadImplementsReflnCompatLib]] dialog box, the correct
Help topic appears.

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

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

2. From the Project menu, click Project1 Properties. Change Project Name to
   MyServer, and then click OK.

3. In Class1, paste the following code:

   Public Sub Test()
   '
   End Sub

4. From the File menu, click Make MyServer.dll to make the interface DLL.

5. From the File menu, click Add Project to add another new ActiveX DLL project
   to the current workspace.

6. Change Project Name to MyNewServer.

7. From the Project menu, click References, select the MyServer check box, and
   then click OK.

8. In Class1, paste the following code to implement the interface that is
   defined in MyServer.dll:

   Implements MyServer.Class1

   Private Sub Class1_Test()
   '
   End Sub

9. From the File menu, click Make MyNewServer.dll.

10. From the Project menu, click MyNewServer Properties. On the Component tab,
   set version compatibility to Binary Compatibility with MyNewServer.dll, and
   then click OK.

   NOTE: Project Compatibility is set automatically.

11. Close the code window for MyNewServer, and repeat step 4 to compile MyServer
   as MyServer.dll again. When you are prompted to replace the existing file,
   click Yes.

12. In the Project explorer window, click MyNewServer (MyNewServer) to highlight
   it. Repeat step 9 to compile MyNewServer as MyNewServer.dll again. When you
   are prompted to replace the existing file, click Yes. Notice that you
   receive the above-mentioned error message.

REFERENCES
==========

For additional information on compatibility, click the article number below to
view the article in the Microsoft Knowledge Base:

   Q161137 HOWTO: Use Project and Binary Compatibility

Additional query words:

======================================================================
Keywords          : kbActiveX kbCompiler kbCOMt kbVBp kbVBp600bug kbGrpDSVB kbDSupport 
Technology        : kbVBSearch kbAudDeveloper kbZNotKeyword6 kbZNotKeyword2 kbVB600Search kbVB600
Version           : :6.0
Issue type        : kbbug
Solution Type     : kbpending

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

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Copyright Microsoft Corporation 2001.