BUG: Error C2065 When You Build an ATL COM Server with Connection Points (256170)

The information in this article applies to:

The Microsoft Active Template Library (ATL) 3.0, when used with:
- Microsoft Visual C++, 32-bit Enterprise Edition 6.0
- Microsoft Visual C++, 32-bit Professional Edition 6.0
- Microsoft Visual C++, 32-bit Learning Edition 6.0

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:

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
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".
Build the application.

Modification Type:	Major	Last Reviewed:	12/11/2003
Keywords:	kbBug kbConnPts kbpending KB256170