how to call function from a component

let's simplify

i have an application (1.mxml) and a component (2.mxml).
private function something(i:string):void {

something("some text");

how can i call the function in 1.mxml from 2.mxml? don't bother with the above code, i know it is not correct, i just need the solution how can i call a function from a different mxml.

thanks in advance
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example component below calls doSomething() in the main app:

<?xml version="1.0" encoding="utf-8"?>
<mx:Canvas xmlns:mx="" width="400" height="108" borderColor="#0096FF" borderStyle="solid" backgroundColor="#FF0000">
	import mx.core.Application;
	<mx:Button x="10" y="68" label="Button" click="Application.application.doSomething();"/>

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thegrooverAuthor Commented:
perfect, thanks
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