Sometimes we need to get the swf path in our flex/flash project, it can be done with _root._url in actionscript 2, but _root not work in actionscript 3. How to get the swf path in as 3? The following is 2 ways on how to get it.
Hope it will be useful for you.

December 12th, 2009
Ntt.cc
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Problem Summary: Once I want to display a series article of Flex performance from InsideRIA(www.insideria.com) in my blog. I recognized that the amount of the articles is increasing. I should keep the links dynamically. However, I am not the provider of the blog system, so I cannot modify the codes to meet my requirement. Luckily, I can embed SWF in my blog articles. So, I just need to develop a simple RSS reader in SWF format.