I began loading thumbnails using AS3’s URLRequest and URLLoader in my main application file. I decided to create a package that would request/load the thumbnails, but I needed to return the data from the URLRequest to my main application. I was able to accomplish it using the dispatchEvent method.
I’m working on a Flash/AS3 application where I am loading various types of files (images, xml, etc). After writing the same code over and over again, I decided to create an AS3 class to use with my application. This class will load image, swf, text, xml, html, stylesheet, json, and sound files.