Declarationproperty ObjID[hobj: integer]: integer;
ObjID is a identification value for the object hobj. ImageEn doesn't use this value directly, but saves and loads it like other properties.
hobj is the ID of the object. You can also specify IEV_NEXT_INSERTED_OBJECT (-1) which refers to the next object to be inserted or IEV_PREVIOUS_INSERTED_OBJECT (-2) for the last object inserted.