Article: Q189382
Product(s): Microsoft C Compiler
Version(s): winnt:5.0
Operating System(s):
Keyword(s): kbnokeyword kbDLL kbMFC kbVC500 kbGrpDSMFCATL kbArchitecture
Last Modified: 17-JUL-2001
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The information in this article applies to:
- The Microsoft Foundation Classes (MFC), used with:
- Microsoft Visual C++, 32-bit Enterprise Edition, version 5.0
- Microsoft Visual C++, 32-bit Professional Edition, version 5.0
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SYMPTOMS
========
When you use the protected CWnd member m_nMsgDragList in an application or DLL
that is linked to the MFC shared DLL, a LNK2001 unresolved external error
occurs.
This error does not occur when you link to the static MFC library.
CAUSE
=====
CWnd::m_nMsgDragList is not exported from the MFC DLL.
RESOLUTION
==========
To workaround this problem, call RegisterWindowMessage with the
DRAGLISTMSGSTRING message and use the value returned instead of
CWnd::m_nMsgDragList. For example:
UINT nMsgDragList = ::RegisterWindowMessage(DRAGLISTMSGSTRING);
STATUS
======
This behavior is by design.
MORE INFORMATION
================
CWnd::m_nMsgDragList is an undocumented member of the CWnd class and is subject
to change. The most common use of CWnd::m_nMsgDragList occurs when you override
OnChildNotify in a CWnd derived class.
(c) Microsoft Corporation 1998, All Rights Reserved.
Contributions by Isaac L. Varon, Microsoft Corporation
Additional query words:
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Keywords : kbnokeyword kbDLL kbMFC kbVC500 kbGrpDSMFCATL kbArchitecture
Technology : kbAudDeveloper kbMFC
Version : winnt:5.0
Issue type : kbprb
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