mary&gt;
''' Called when a parameter's value is set
''' &lt;/summary&gt;
''' &lt;param name="locale"&gt;Current locale e.g. en-us&lt;/param&gt;
''' &lt;param name="paramNumber"&gt;1-based index of parameter&lt;/param&gt;
''' &lt;param name="valueNumber"&gt;1-based index of value&lt;/param&gt;
''' &lt;param name="changedParameterIndex"&gt;Optional: if setting this value causes
 the list
''' of options for another parameter to change, then this should be set to an
 array
''' of indexes of the parameters that 