c++ - Release Interface pointers -

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I, in some smart signal class desiccator, have declared the member variable within a class to free this interface The code, which is better, is:

Members varible 

  CComQIPtr & lt; IMyInterFace & gt; m_pMyInterface;   
 constructor  
  m_pMyInterface.CreateInstace (CLSID_MyInterface); Destructive in   
  
  if (m_pMyInterface) m_pMyInterface.Release ();   
 Or should it be  
  if (m_pMyInterface.p = zero!) M_pMyInterface.Release ();   
 The above form which is a better one and the way I am using interface pointsers there is a flaw. Tom   
 
 
  ~ CComQIPtr  The Destructor takes care of everyone to explicitly release you There is no need to do so, if you want, to reuse the variable, you can do either of the two:  
     
  •   m_pMyInterface.Release ();   
  •   m_pMyInterface = Zero;    
     With zero (operator  =   CComPtr , with  CComQIPtr  may be unclear) Works) check is not required, the  CComQIPtr :: release  method does this anyway.

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