LbxGetSelItems( hWnd )-> <aItems>
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 PARAMETER:

 <hWnd> is the handle that identifies the listbox control


 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 LbxGetItem


 SOURCE:  

  SOURCE\WINAPI\LBX.C