_com_ptr_t::QueryInterface

Visual Studio 2015
 

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Microsoft Specific**

Calls the QueryInterface member function of IUnknown on the encapsulated interface pointer.

Copy 
  
      template<typename _InterfaceType> HRESULT QueryInterface (  
   const IID& iid,  
   _InterfaceType*& p   
) throw ( );  
template<typename _InterfaceType> HRESULT QueryInterface (  
   const IID& iid,  
   _InterfaceType** p  
) throw( );

Parameters

iid
IID of an interface pointer.

p
Raw interface pointer.

Calls IUnknown::QueryInterface on the encapsulated interface pointer with the specified IID and returns the resulting raw interface pointer in p. This routine returns the HRESULT to indicate success or failure.

END Microsoft Specific

_com_ptr_t Class

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