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progress bar in air

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i am new to flex and
any body tell me how to add a dynamic progress bar to a window.

the scenario folllowas as,

when ever i click a button on parent window a small new child window should open and progress bar should run implicitly .

Please help me and thanks in advance.

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In the parent window do this:

protected var ttlWndw:TitleWindow;

protected function btn_click(evt:MouseEvent):void {
ttlWndw = new TitleWindow();
ttlWndw.title = "Spark TitleWindow title";
ttlWndw.width = 300;
ttlWndw.height = 200;
ttlWndw.addEventListener(CloseEvent.CLOSE, ttlWndw_close);
PopUpManager.addPopUp(ttlWndw, this, true);

In the small window/ title window in our case:
In the mxml place a progress bar component and in the action script place this:

bar.setProgress( <value>, <total>);

Not sure what are you trying to upload if its a file then you will need to pass the filesize into the small window and then dynamically get the percentile completed.

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