iOS Question B4i - CustomListView - A line to separate items

I have to add a line between different items in a customlistview.
I thaught it was possible to modify Private HighlightColor in the customListView module (Private HighlightColor As Int = Colors.Black) but it does not change.
Can I modify "dividerHeight = 1dip" and how modify the color othe line which divide?
Thank you