System.Windows.Forms.TextBox.AutoCompleteListBox.GetItemAt C# (CSharp) Method

			int GetItemAt (Point loc)
			{
				if (loc.Y > (last_item - top_item) * item_height + item_height)
					return -1;

				int retval = loc.Y / item_height;
				retval += top_item;

				return retval;
			}