Yeah hi!
What exactly is/are the file extension(s) of a Flex app's source file(s)?
Is it only .mxml or are there a whole bunch of other files?
What about, for example: .actionScriptProperties .flexProperties .project ?
Basically, a third party to a client has told me "yes, all the source files are there" and I'm not seeing any .mxml files, so I just need to know if there are other editable files I can use to compile a Flex app, or if they're just full of shit.
Thanks. 
.mxml and .as will be the files you'll need
Storm:
i could be totally wrong - and it's a terrible practice to get into, but couldn't you name the external AS and class style files using any file extension you wanted so long as they are referenced/called properly in the parent file?
I've never thought about it, but I'm sure it's possible. My guess (with my knowledge of Adobe though) is the compilers will choke because it looks for .AS files to match the Class name used in the project. It is quite strict in that way but possible if they coded it to be flexible.
I think the problem for XDud is that the agency passed him a bunch of Flex project files which are more just reference to the JS nature of Eclipse itself (path to compiler, class paths, config xml files, etc).
There's also the problem whereby they may not have actually included all the referenced classes they used externally. If X has the Flex SDK he should have all the Flex core classes but it is always quite messy until both sides communicate properly so both sides understand the structure.
Honestly, it's why I still LOVE code in MovieClips. "Bad programming" I know, but if you have the MC in your .FLA, you KNOW you have the code too. It makes passing projects way easier.
Originally posted by: Storm I think the problem for XDud is that the agency passed him a bunch of Flex project files which are more just reference to the JS nature of Eclipse itself (path to compiler, class paths, config xml files, etc).

Doodles, try installing the FDT trial and see what that gives you.
Holy pupen, 354 MB? I though Flex was lightweight and all that.
How do I open a project -- as a folder? Is there a certain file type I need to click on? If I pick one MXML or AS file randomly, will it be smart enough to open the full project?

Start FDT. It will ask you to define a workspace. All this means is that it wants to know where you want to store all of your files for your various projects. Select the directory containing the folder with all of the files the client gave you. FDT will then go into editing mode. On the left, you should see a panel called Navigator. Right click in the panel, select "New Project." Follow the prompts. Make sure to name the project the same as the aforementioned folder. If all goes well, FDT will then say something along the lines of, "Hey, it looks as though there is already a project created with that name. Should I use the existing files?" Say yes. Bam! You should have a Flex project that is good to go.
/grabs popcorn
*moved to Support thread