A common way to make assets, such as graphic, audio and video files, available at run time is to import the assets into your Flash library and check "Export to ActionScript" in the Properties dialog.
But there are some drawbacks to including assets this way. For example it may be more difficult to access those assets from multiple SWF files. I find that creating an "Assets" class that holds all my images, movies, and sound files is the best way to handle assets when building complex Flash sites.
In this tutorial, I'll make an "Assets" class and embed PNG, SVG, MP3, and SWF files using the <embed> tag. Then we'll place these assets on the stage at run time.
