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<mx:Script>
import flash.external.*;
public function myFunc():Number {
return 42;
}
public function initApp():void {
ExternalInterface.addCallback("myFlexFunction",myFunc);
}
</mx:Script>
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<SCRIPT language='JavaScript' charset='utf-8'>
function callApp() {
var x = MyFlexApp.myFlexFunction();
alert(x);
}
</SCRIPT>
<button onclick="callApp()">Call App</button>
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