Loadng a style sheet when you click the button
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<!-- styles/BasicApp.mxml -->
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"
xmlns:mx="library://ns.adobe.com/flex/mx"
xmlns:s="library://ns.adobe.com/flex/spark">
<fx:Script>
public function applyRuntimeStyleSheet():void {
styleManager.loadStyleDeclarations("../assets/BasicStyles.swf")
}
</fx:Script>
<s:VGroup>
<s:Label
text="Click the button to load a new CSS-based SWF file." />
<s:Button id="b1" label="Click Me"
click="applyRuntimeStyleSheet()" />
</s:VGroup>
</s:Application>
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