Has anyone ever used this command? Need proper syntax

[magyarok_saman]

sysban_add [ ] [ ]

what
The criterion you're blocking
value
The value you're blocking
days
Length of the ban, in days (or 0 for forever)
note
Reason why you're setting this ban

The "days" and "note" are self-explanatory but what are the valid values for "what" and "value"?