Addon communicating in classic

[Hypestar]

Hello there,

i am working on an addon for my guild that should let us write some stuff in a couple of editboxes.
The ultimate goal would be to have these entries synced with other players in the raid using that addon so everyone sees the same entries in those boxes in their own addon.

I am quite new to addon developing in wow but got a broad background in programming.
So i am wondering what would be the the preferred way of achieving this in classic wow.

Thank you guys in advance.