If you're looking to go from AS3->C++ through Haxe, then you should check out NME. It allows you to use the Flash Player API to write applications to compile to native ones (through the C++ backend), swfs and html5 applications.
Also it offers a whole workflow for assets and such. And it has pretty good integration with FlashDevelop (windows only) and MonoDevelop, but you can of course use any IDE.