Retrieves a pointer to the requested interface.
STDMETHOD(QueryInterface)(
   REFIID iid,
   void** ppvObject 
);
Parameters
- iid 
 [in] The identifier of the interface being requested.
- ppvObject 
 [out] A pointer to the interface pointer identified by iid. If the object does not support this interface, ppvObject is set to NULL.
Return Value
A standard HRESULT value.
Requirements
Header: atlcom.h