I have a need to read data from outside system generating x y z coordinates, generating G code line, executing it in MACH and repeating this loop.

Can somebody point me in the right direction.
Thanks

ok, have your outside source write a plain text file of coordinates, (or what ever else).
open/read that file into your plugin, process your lines into G-code, push that into
a cstring block. Push that block into the Gcode editor via mach3 calls, then run the code.....

Thank you for your kind advice.