Introduction - If you have any usage issues, please Google them yourself
This sample shows how to use the ehanced SelectionSet API to ...
(1) highlight a nested entity inside of an XRef (largely as implemented in the AutoCAD 2004 ARX API). This is referred
to as subentity selection in the project. It makes use of a subentity selection filter.
(2) select in space within an entity
(3) subselect an (already selected) entity.
Functionalities (2) and (3) make use of a subselection filter.