SegmentedButton.SelectedSegment
From Xojo Documentation
Read-Only Property (As Segment )
SegmentValue = aSegmentedButton.SelectedSegment
New in 2019r2
Supported for all project types and targets.
New in 2019r2
Supported for all project types and targets.
Provides the Segment at the requested index.
Notes
For multi-selection SegmentedButtons this returns the last segment that was selected.