PRB: CWnd::m_nMsgDragList Not Exported by the MFC DLL (189382)
The information in this article applies to:
- The Microsoft Foundation Classes (MFC), when used with:
- Microsoft Visual C++, 32-bit Enterprise Edition 5.0
- Microsoft Visual C++, 32-bit Professional Edition 5.0
This article was previously published under Q189382 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.
| Modification Type: | Major | Last Reviewed: | 11/18/2003 |
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| Keywords: | kbArchitecture kbDLL kbprb KB189382 |
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