CComQIPtr::CComQIPtr
CComQIPtr( );
CComQIPtr( T***** lp );
CComQIPtr( const CComQIPtr< T**,** piid >& lp );
CComQIPtr( IUnknown* lp );
Parameters
lp
[in] Used to initialize the interface pointer, p.
T
[in] A COM interface.
piid
[in] A pointer to the IID of T.
Remarks
The default constructor sets p to NULL. The copy constructor sets p to the member pointer of lp and calls AddRef through p.
If you pass a pointer type derived from T, the constructor sets p to the T* parameter and calls AddRef. If you pass a pointer type not derived from T, the constructor calls QueryInterface to set p to an interface pointer corresponding to piid.
The destructor calls Release through p.