ContainerControl.AllowFocusRing
From Xojo Documentation
Property (As Boolean )
aContainerControl.AllowFocusRing = newBooleanValue
or
BooleanValue = aContainerControl.AllowFocusRing
New in 2019r2
Supported for all project types and targets.
or
BooleanValue = aContainerControl.AllowFocusRing
New in 2019r2
Supported for all project types and targets.
If True, the ContainerControl indicates that it has the focus with a ring around its border; if False, the appearance of the object does not change when it has the focus.
Setting this property to True has no effect on Windows or Linux. The default is True.