Re: When To AddRef

"Scott McPhillips [MVP]" <org-dot-mvps-at-scottmcp>
Fri, 16 Nov 2007 09:39:44 -0500
"Alexander Mueller" <> wrote in message


Thanks for the info.
How do I release/delete/remove from memory a pointer wrapped with CComPtr?
Simply NULL it?
Do I have to take care of relasing it at all?


 CComPtr<IWMWriter> _pAsfWriter;
 _pAsfWriter = pAsfWriterTmp;

 //doesn't work any longer for obvious reasns:

 //also fails, cause object wasn't new'ed

 _pAsfWriter = NULL; //doesn't fail but is it crrect?

When a CComPtr is destroyed (such as at end-of-function or destruction of a
containing object) it releases the pointer. So you typically don't have to
do anything in your code to release it. Very handy.

If you deliberately want to release it (perhaps to reassign within a loop,
or to let the referenced object die) you can call

Scott McPhillips [VC++ MVP]

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