I have a listbox that displays one item at a time and the user scrolls up/down the list using the arrows on the side.
By default the first item on the list is selected and displayed when the window is created, but I want item #6.
ListBox.SelectedIndex does set the right parameter in the control internals, but does not affect the display, which continues to show item #1 in the box and it is highlighted, as if it's currently selected.