Structures are still available in Phrogram, but we changed them to work like structures (passed by value on function/method calls) instead of working as classes do (passed by reference on function/method calls),  Structures were inconsistently passed ByRef in KPL v1.1.

As you found, structures in KPL can be easily changed to classes in Phrogram and they will work as they did in KPL.

Thanks