I am developing an application where the user has control over the contents a certain ListBox. The ListBox is not sorted. While it's easy to get the user's input from a TextBox and then to add its contents to the ListBox, I'd like an easy way for the user to be able to indicate where the new value should be inserted. I envision something like a fly-over arrow that would become visible when the mouse was over the listbox, and when the user decides that it is at the corrent position a right-mouse click would insert the value from the TextBox. It would also require that the listbox automatically scroll (if necessary) when the fly-over arrow was either at the top or bottom of the ListBox.

Does anyone have code samples and/or other/better ways of doing it?