Your gui can talk to a .net server using webservices and http services for which Flash Builder provides lot of tooling support through the Data menu. The asp.net project in Flash Builder will just help you set up the launch urls for your application for debug and run environments (that is after you give your server and web root details during project setup, an example of that would be http://localhost and c:\inetpub\www respectively)
If you want to use AMF a binary way of exchanging data, you might have to use a third party solution like weborb or fluorine.
Hope this helps.
var srv:HTTPService = new HTTPService();
srv.url = 'http://url.com/';
srv.resultFormat = 'e4x';
srv.method = 'POST';
srv.useProxy = false;
srv.showBusyCursor = true;
srv.request.filename = file+'.txt';
srv.request.contents = contents;
That will let me pull the generated html but I don't think thats really usefull as its going to contain a ton of junk that my app doesn't care about. Also from the sample I saw, asp is embedding the entire session in a ascii block in the html page. Parsing that would require some special library I guess.
You can try using the HTTPService Wizard and configure your URL.
After that you can use the configure return type to analyze the response of the request there, it has basic support to parse the XML and set the return type.
Flash Builder also provides default deserializers to convert from XML / JSON to AS objects.
Try it out and let us know if you have any feedback on that.
Thanks for your feedback! Our asp team is going to meet with me to decide what sort of common interface we want to have so I can make some of these suggestions.