DesktopListBox.AllowFocusRing

From Xojo Documentation

Property (As Boolean )
aDesktopListBox.AllowFocusRing = newBooleanValue
or
BooleanValue = aDesktopListBox.AllowFocusRing

New in 2021r3

Supported for all project types and targets.

If True, the control indicates when it has the focus by drawing a ring around its border. If False, the appearance of the control does not change when it has the focus.