ListBox.HeaderBackgroundPaint
From Xojo Documentation
Event
ListBox.HeaderBackgroundPaint(g As Graphics, column As Integer) As Boolean
New in 2020r1
Supported for all project types and targets.
New in 2020r1
Supported for all project types and targets.
Allow you to take control of drawing the background of the column headers.
Notes
Return True from this event to make any drawing you do in the Graphics parameter passed (g) take effect.
See Also
HeaderContentPaint event.