ListBox.ScrollPosition

From Xojo Documentation

Property (As Integer )
aListBox.ScrollPosition = newIntegerValue
or
IntegerValue = aListBox.ScrollPosition

Supported for all project types and targets.

Zero-based index of the top visible row in the ListBox.

Notes

Read ScrollPosition to determine the top visible row; write to ScrollPosition to scroll the ListBox. When the scrollbar thumb is scrolled to the bottom, ScrollPosition cannot be incremented any further.