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Q150571: FIX: CWnd::DragAcceptFiles() in Books Online

Article: Q150571
Product(s): Microsoft C Compiler
Version(s): winnt:
Operating System(s): 
Keyword(s): kbMFC kbDocs kbVC100bug kbVC150bug kbVC151bug kbVC152bug kbVC200bug kbVC210bug kbVC220b
Last Modified: 03-AUG-2001

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The information in this article applies to:

- The Microsoft Foundation Classes (MFC), used with:
   - Microsoft Visual C++, versions 1.5, 1.51, 1.52 
   - *EDITOR Please do not choose this product*Microsoft Visual C++ 32-bit Edition* use 241, 265, 225, versions 2.0, 2.1, 2.2, 4.0, 4.1 
   - 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
========

The documentation for CWnd::DragAcceptFiles() in Books Online states:

  Call this member function from within the main window in your application's
  CWinApp::InitInstance function to indicate that your main window and all
  child windows accept dropped files from the Windows File Manager.

This information is not correct. The message is not propagated to the child
windows.

STATUS
======



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

Since DragAcceptFiles() is a member function of CWnd class, a CWnd pointer is
needed to call this function in CWinApp::InitInstance(). The window that calls
DragAcceptFiles() with the bAccept parameter set to TRUE has identified itself
as able to process the WM_DROPFILES message from Windows File Manager.

For example, in an MFC MDI application, if the CMDIFrameWnd window pointer is
used in the DragAcceptFiles() function call, only the CMDIFrameWnd window gets
the WM_DROPFILES message. This message is not sent to all open CMDIChildWnd
windows. For a CMDIChildWnd window to receive this message, you need to call
DragAcceptFiles() with the CMDIChildWnd window pointer.

The correct documentation is also found in Windows API DragAcceptFiles() function
in Books Online.

Additional query words: kbdocerr

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Keywords          : kbMFC kbDocs kbVC100bug kbVC150bug kbVC151bug kbVC152bug kbVC200bug kbVC210bug kbVC220bug kbVC400bug kbVC500bug kbVC600fix kbGrpDSTools kbNoUpdate 
Technology        : kbAudDeveloper kbMFC
Version           : winnt:
Issue type        : kbbug
Solution Type     : kbfix

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