LbxGetSelItems()-> <aItems>
------------------------------------------------------------------------------


 RETURNS:

  In an multi-selection listbox, <aItems> is a clipper array which holds 
  the order number ( index ) of all Items that are currently selected.


 DESCRIPTION:

  This function retrieves the item numbers of all selected items by sending 
  a LB_GETSELITEMS message to the multiple-selection list box. You can then
  access the associated items with ::GetItem