In many cases, ObjectARX function signatures have been changed to use polymorphic types. For instance, long types that store pointers have been changed to the LONG_PTR pointer precision type. LONG_PTR remains long for 32-bit API usage and becomes __int64 in 64-bit builds. Similarly, types that represent legacy (or “old”) object IDs change from LONG_PTR to Adesk::Int-DbId. Graphics system (GS) and selection markers have been changed from int to Adesk::GsMarker.
The following list summarizes additional changes from 32-bit types to polymorphic types in ObjectARX function signatures: