Applying style to Tooltip in Flex 4

Applying style to Tooltips in Flex is more simpler than in Flex 3.

In Flex4 Style tag is used to define styles for the application,Style tag is component of http://ns.adobe.com/mxml/2009 package.here is the sample style class to styleing tooltip component

<fx:Style>
        @namespace s "library://ns.adobe.com/flex/spark";
        @namespace mx "library://ns.adobe.com/flex/halo";
 
        mx|ToolTip {
            backgroundAlpha: 1.0;
            fontSize: 21;
            backgroundColor: #456789;
            color: white;
            cornerRadius: 0.5;
            
        }
</fx:Style>

We can also do the same using the Actionscript code,here is the sample code for that

private function init():void {
                var cssDecl:CSSStyleDeclaration = StyleManager.getStyleDeclaration("mx.controls.ToolTip");
                if (!cssDecl) {
                    cssDecl = new CSSStyleDeclaration("mx.controls.ToolTip");
                }
                cssDecl.setStyle("backgroundAlpha", 1.0);
                cssDecl.setStyle("backgroundColor", "black");
                cssDecl.setStyle("color", "white");
                cssDecl.setStyle("cornerRadius", 0);
                cssDecl.setStyle("fontSize", 24);
            }