Returns the specified interface of the host.
HRESULT QueryHost( REFIID iid, void** ppUnk ); template <class Q> HRESULT QueryHost( Q** ppUnk );
[in] Specifies the IID of the control's interface.
[out] A pointer to the interface on the host. In the template version of this method, there is no need for a reference ID as long as a typed interface with an associated UUID is passed.
[in] The interface that is being queried for.