ListBox.GridLinesHorizontalStyle
From Xojo Documentation
Property (As ListBox.Borders )
aListBox.GridLinesHorizontalStyle = newListBox.BordersValue
or
ListBox.BordersValue = aListBox.GridLinesHorizontalStyle
New in 2019r2
Supported for all project types and targets.
or
ListBox.BordersValue = aListBox.GridLinesHorizontalStyle
New in 2019r2
Supported for all project types and targets.
Draws horizontal lines between rows in the selected style.
Notes
The style for the borders is selected using ListBox.Borders.
Example
This example sets the gridlines to Thin Solid. The example is in the Open event of the ListBox.
Me.GridLinesHorizontalStyle = ListBox.Borders.ThinSolid