PRB: Arrow Key Inconsistency in List Boxes (141908)

SYMPTOMS

After creating a list box, you notice that its behavior is inconsistent when scrolling through the records by using the arrow keys.

Place the following code in List2.Keypress to stop the arrow keys from moving beyond the top and bottom:

LPARAMETERS nKeyCode, nShiftAltCtrl
if (this.listindex=this.listcount and nKeyCode=24) or;
   (this.listindex=1 and nKeyCode=5)
    nodefault
ENDIF

Microsoft is researching this behavior and will post new information here in the Microsoft Knowledge Base as it becomes available.

Create a form, and place two list boxes (List1 and List2) on it.
Populate List1 with more items than are displayable so that the scroll bar is available.
Populate List2 with only a couple of items so that the scrollbar is not active.
Scroll through both the list boxes by using the arrow keys.
Notice that in the second list box, you can continuously scroll up past the first list item to the bottom of the list and down past the end of the list to the top. In List1 the scrolling stops at the top and the bottom of the list.