Hardware problem? I'm not sure exactly what your problem is unless it may be
related to hardware failure. Here's an excerpt from a previous helpfile:
Multiple items are selected by holding down SHIFT and clicking them with the
mouse or by holding down SHIFT and pressing an arrow key to extend the
selection from the previously selected item to the current item. You can
also select items by dragging with the mouse. Holding down CTRL and clicking
an item selects or deselects that item.
You can use the ListIndex property to return the index number for the
selected item. When the MultiSelect property is set to Extended or Simple,
you can use the list box's Selected property or ItemsSelected collection to
determine the items that are selected. When there are multiple selections in
a list box, the value of the list box control will always be Null.
If the MultiSelect property is set to Extended, requerying the list box
clears any selections made by the user.
--
Arvin Meyer, MCP, MVP
Microsoft Access
Free Access downloads
http://www.datastrat.com
http://www.mvps.org/access