Retrieves the current selection mode of the list box.
Syntax
public int getSelectionMode()
Return Value
Returns the selection mode. Possible values are:
SelectionMode.ONE indicates that only
one item can be selected at a time.
SelectionMode.MULTI_EXTENDED
indicates that more than one item at a time can be selected and that keyboard characters,
such as SHIFT and CTRL, can be used to assist in the selection.