<mx:Button toolTip="Identify" click="{myMap.addEventListener(MapMouseEvent.MAP_CLICK, mapClickHandler)}" /> <esri:Map id="myMap" openHandCursorVisible="false">
Mike,
You need to do something like this:<mx:Button toolTip="Identify" click="{myMap.addEventListener(MapMouseEvent.MAP_CLICK, mapClickHandler)}" /> <esri:Map id="myMap" openHandCursorVisible="false">