listbox large item problem

Hi:

I am trying to implement a listbox, where each item displayed can take up more than one line (the text wraps). I am using overridden MeasureItem and DrawItem methods to do this. It works except if the size of the text in the rectangle bounds I am drawing in the listbox for an item exceeds the height of the listbox. In this case,the drawn item is truncated (only first few lines of text are actually displayed) & vertical scroll does not activate. How do you load an item into a ListBox that exceeds its height

Thanks, Garnett