Sets the GUID of the interface for the given safe array.
A pointer to the safe array descriptor.
A pointer to the IID.
The return value obtained from the returned HRESULT is one of the following.
If psa is null or if the array descriptor does not have the FADF_HAVEIID flag set. For more information about the FADF_HAVEIID flag see SAFEARRAY Data Type [Automation].