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Q192626: FIX: Adding Method to Custom Interface Causes MIDL2269

Article: Q192626
Product(s): Microsoft C Compiler
Version(s): 5.0,6.0
Operating System(s): 
Keyword(s): kbwizard kbClassView kbide kbMiscTools kbVC500bug kbVC600bug kbGrpDSTools kbNoUpdate
Last Modified: 10-FEB-2002

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The information in this article applies to:

- Microsoft Visual C++, 32-bit Enterprise Edition, versions 5.0, 6.0 
- Microsoft Visual C++, 32-bit Professional Edition, versions 5.0, 6.0 
- Microsoft Visual C++, 32-bit Learning Edition, version 6.0 
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SYMPTOMS
========

Adding a method to an ATL class generates the following compile time error:

  MIDL2269 : procedures in an object interface must return an HRESULT

CAUSE
=====

The method implements a custom interface, does not use the [local] attribute,
and does not return a value of type HRESULT.

RESOLUTION
==========

Add the [local] attribute to either the interface or the method.

STATUS
======

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

This problem was corrected in Microsoft Visual C++ .NET.

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

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

1. Create a default ATL project.

2. Right-click the project in ClassView and select New Class.

3. In the New Class dialog box, select ATL Class as the class type.

4. Enter a name for the class, and select Custom for the Interface type. Click
  OK.

5. Right-click the interface in ClassView and select Add Method.

6. In the "Add Method to Interface" dialog box, select any return type other
  than HRESULT.

7. Enter a method name, and specify the parameters. Click OK.

8. Build the project.

Additional query words:

======================================================================
Keywords          : kbwizard kbClassView kbide kbMiscTools kbVC500bug kbVC600bug kbGrpDSTools kbNoUpdate 
Technology        : kbVCsearch kbAudDeveloper kbVC500 kbVC600 kbVC32bitSearch kbVC500Search
Version           : :5.0,6.0
Issue type        : kbbug
Solution Type     : kbfix

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