ListBox.AllowFocusRing
From Xojo Documentation
Property (As Boolean )
aListBox.AllowFocusRing = newBooleanValue
or
BooleanValue = aListBox.AllowFocusRing
New in 2019r2
Supported for all project types and targets.
or
BooleanValue = aListBox.AllowFocusRing
New in 2019r2
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.