ContainerControl.LockLeft
From Xojo Documentation
Property (As Boolean )
aContainerControl.LockLeft = newBooleanValue
or
BooleanValue = aContainerControl.LockLeft
Supported for all project types and targets.
or
BooleanValue = aContainerControl.LockLeft
Supported for all project types and targets.
Determines whether the left edge of the ContainerControl should stay at a set distance from the left edge of the parent control, if there is one, or the owning Window.
Notes
Beginning with version 2009r5, LockTop and LockLeft default to True when you add a control to a window. Existing controls will be altered only if LockRight and/or LockBottom are not set.