Hi,
These are the functions related to read Neuroscan .eeg , .avg and .cnt files (including the headers).
https://github.com/brainstorm-tools/brainstorm3/search?q=neuroscan_read_header
The EEprobe continuous data (also .cnt) is different from the Neuroscan .cnt format. You can find functions to read EEProbe files in Matlab in: https://robertoostenveld.nl/eeprobe/
Best,
Raymundo