CComAggObject::QueryInterface
Retrieves a pointer to the requested interface.
STDMETHOD(QueryInterface)(
REFIID iid,
void ** ppvObject
);
template <class Q>
HRESULT STDMETHODCALLTYPE QueryInterface(
Q** pp
);
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.pp
[out] A pointer to the interface pointer identified by type Q. If the object does not support this interface, pp is set to NULL.
Return Value
A standard HRESULT value.
Remarks
If the requested interface is IUnknown, QueryInterface returns a pointer to the aggregated object's own IUnknown and increments the reference count. Otherwise, this method queries for the interface through the CComContainedObject member, m_contained.
Requirements
Header: atlcom.h