1. Yes of course. Just add the executable to your batch file like any other exe.
2. A little tricker. Currently LabVIEW doesn't currently provide a way of setting the exe Exit Code in an executable (it is on Idea Exchange here). You could write to the stdout stream in your exe and then pipe this to a file via cmd script but this requires a bit of work (and unmanaged calls).
I'd suggest the best way would be for your LabVIEW exe to write the result to the file directly on disk rather than just exposing the value(s) on the connector pane. If you need your batch script to customise the filename, you could pass a command-line argument to your exe specifying such.
