Microsoft KB Archive/256170

Knowledge Base

BUG: Error C2065 When You Build an ATL COM Server with Connection Points

Article ID: 256170

Article Last Modified on 12/11/2003

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APPLIES TO

• Microsoft ActiveX Template Library 3.0, when used with:
  • Microsoft Visual C++ 6.0 Enterprise Edition
  • Microsoft Visual C++ 6.0 Professional Edition
  • Microsoft Visual C++ 6.0 Standard Edition

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This article was previously published under Q256170

SYMPTOMS

When you compile an Active Template Library (ATL) COM server project with connection point support, you may receive the following error messages:

testobj.h(76) : error C2065: 'IID__ITestObjEvents' : undeclared identifier

testobj.h(76) : error C2440: 'static_cast' : cannot convert from 'class CTestObj *' to 'class ATL::_ICPLocator *' Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast

This problem typically occurs with projects in long directory paths.

CAUSE

IID__ITestObjEvents is an incorrectly generated interface ID.

RESOLUTION

Go to the file and line number that are listed in the error message above. In the connection point map, change IID__ITestObjEvents to DIID__ITestObjectEvents as follows:

BEGIN_CONNECTION_POINT_MAP(CTestObject)
      //CONNECTION_POINT_ENTRY(IID__TestObjectEvents)
      CONNECTION_POINT_ENTRY(DIID__ITestObjectEvents)
END_CONNECTION_POINT_MAP()
                

STATUS

Microsoft has confirmed that this is a bug in the Microsoft products that are listed at the beginning of this article.

MORE INFORMATION

Steps to Reproduce Behavior

To reproduce this bug, perform the following steps:

1. Obtain the ATL Tutorial. In the MSDN version that shipped with Microsoft Visual C++ version 6.0 and later, search for "ATL Tutorial". You can also find this tutorial at the following Web site:

   http://msdn.microsoft.com/library/devprods/vs6/visualc/vcmfc/_atl_atl_tutorial.htm

2. Follow the tutorial steps 1, 2, and 5 (you can omit steps 3 and 4) and create an ATL COM server in a long directory path; for instance, "C:\Program Files\Microsoft Visual Studio".
3. Build the application.

Keywords: kbbug kbconnpts kbpending KB256170

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