Embedding assets

[Embed( source="/assets/images/box.jpg", mimeType="application/octet-stream" )]
private var jpgBytes:Class;

Creating popup in flex using popupmanager

var printComponent:PagesPreview = PagesPreview(PopUpManager.createPopUp(this,PagesPreview,false));
printComponent.width = 0;
printComponent.height = 0;
PopUpManager.centerPopUp(printComponent);