ListBox.AllowResizableColumns
From Xojo Documentation
Property (As Boolean )
aListBox.AllowResizableColumns = newBooleanValue
or
BooleanValue = aListBox.AllowResizableColumns
New in 2019r2
Supported for all project types and targets.
or
BooleanValue = aListBox.AllowResizableColumns
New in 2019r2
Supported for all project types and targets.
If True, the user can resize columns by moving the pointer over a column divider and dragging to the left or right.
Notes
When the pointer is over a divider, it changes to an East-West Splitter pointer to indicate that the user can drag the divider. If AllowResizableColumns is False, the pointer does not change its shape.
Example
This example enables the resizable feature.