I'd like to suggest special characters (\r, \n, \0, \\, etc) in strings.
"Hello.\n" would be the same as "Hello."+chr(10)
This brings a different way of string interpretation, as character escaping would also be useful, so it won't be fully compatible with Fenix code (the '\' char in Fenix is just a '\'). Perhaps have it as a bgdc.exe parameter again.
Another thing to consider is the way \n behaves. It's also possible to have its meaning depending on the OS (so on Windows it's CR+LF and on Unix it's only LF).
Well just an idea, but perhaps it's more work than it's worth.