Q98602: INFO: Adding a CObList Object to Another CObList

Article: Q98602
Product(s): Microsoft C Compiler
Version(s): winnt:
Operating System(s): 
Keyword(s): kbMFC kbVC100 kbVC150 kbVC200 kbVC400 kbCollectionClass
Last Modified: 07-MAY-2001

1.00 1.50 1.51 1.52 | 1.00 2.00 2.10 4.00
WINDOWS             | WINDOWS NT
kbprg


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The information in this article applies to:

- The Microsoft Foundation Classes (MFC), used with:
   - Microsoft Visual C++ for Windows 
   - Microsoft Visual C++ 32-bit Edition 
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When the parameter to the AddHead() or AddTail() member functions of
CObList specifies a pointer to an object derived from CObList, the
functions add all the items specified in the argument object to the
list. To add the CObList object to the list, the application must cast
the CObList pointer to a CObject pointer.

In the CObList class, the AddHead() and AddTail() functions accept
either a "CObject *" or a "CObList *" argument. When the functions
receive a "CObList *", the functions add all the items in the
specified list to the list. To add the list object to another list,
cast the list pointer to a CObject pointer. The following sample code
demonstrates the differences between these methods.

Sample Code
-----------

     // adds all of the CObject items contained in listSrc to listTarget
     listTarget.AddTail(&listSrc);

     // adds listSrc as a CObList object to listTarget
     listTarget.AddTail((CObject *)&listSrc);

SUMMARY
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Additional query words: kbinf 1.00 1.50 2.00 2.10 2.50 2.51 2.52 3.00 3.10 4.00

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Keywords          : kbMFC kbVC100 kbVC150 kbVC200 kbVC400 kbCollectionClass 
Technology        : kbAudDeveloper kbMFC
Version           : winnt:
Issue type        : kbinfo

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