Used between the BEGIN_INTERFACE_MAP macro and the END_INTERFACE_MAP macro for each interface your object will support.
INTERFACE_PART(theClass, iid, localClass)
- The name of the class that contains the interface map.
- The IID that is to be mapped to the embedded class.
- The name of the local class.
It allows you to map an IID to a member of the class indicated by theClass and localClass.
For more information on interface maps, see Technical Note 38.