The Express version doesn't have all the bells and whistles of the Standard version, but it's enough to create console apps, full windows apps, games, dlls, etc.  BTW, the Express version(s) of Visual Studio count towards (qualify you for) 'upgrade' pricing on the Standard and Professional versions - so no need to ever buy the full retail version - if you find you need to upgrade to the Standard version at some point, you just pay upgrade pricing (~$175 or so, instead of ~$270 for the full retail box).

And yes... if you moved any of that to C, you'd want to move the entire linecast_loop() functionality over and just figure out how to get the data (various arrays) to it and the results (various arrays) back from it.

I assume you'd open a pipe, spawn the C app, have the C app connect to the pipe, get data, process data, return results and exit, but ADP should have a better idea of the best way to do all that (or going the .dll route - which would be even cleaner, if you can figure out the data / stack / function-calling interface).

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