ContainerControl.AllowTabs
From Xojo Documentation
Property (As Boolean )
aContainerControl.AllowTabs = newBooleanValue
or
BooleanValue = aContainerControl.AllowTabs
New in 2019r2
Supported for all project types and targets.
or
BooleanValue = aContainerControl.AllowTabs
New in 2019r2
Supported for all project types and targets.
If True and AllowFocus is True, then pressing Tab triggers the KeyDown event for processing.
Notes
If AllowTabs is False, pressing the Tab key does not trigger the KeyDown event; pressing Tab triggers the LostFocus event and selects the next object in the Window that can accept the focus.