VBA Rolling Wave Baseline

Would like to update the baseline as each iteration is completed ... freezing
the next iteration baseline and saving an updated baseline for tasks beyond
that next iteration. Also would like to select newly added tasks (usually
from splitting a larger previously-baselined task) and add them to the
baseline.

Key is selecting the appropriate tasks. Updating the baseline thereafter is
straightforward for the selected tasks.

Any guidance?

Thanks,
Bruce