If you can stand 1 more (simpler, I think):
Click on Reports from Main "form" (program)
choose Demographics as the category, Chart ID as the field, <> (not equals as the operator and 0 as the value,
Click [add Criteria to Query], then [Run Report].
Then click twice on the Report column HEADER ID (first click sorts Ascending, 2nd click Descending) then the TOP value is the last Chart ID Created.

Roger
(Nephrology)
Do the right thing. The rest doesn?t matter. Cold or warm. Tired or well-rested. Despised or honored. ? --Marcus Aurelius --