It works fine for me. I think that something else is going on.
Could you send to me the WORKING sample to reproduce the behavior?

>In the .Click() I create a messagebox with the question if the user wants to process the selected items. The messagebox takes the focus from the listbox. The specific .click() code I use is the following. I changed the "real" data handling with a messagebox for testing purposes.
>
>FOR lnCount = 1 TO .ListBox.ListCount
> IF .ListBox.Selected(lnCount)
> MESSAGEBOX(TRANSFORM(.ListBox.List(lnCount,1)))
> ENDIF
>ENDFOR