Hi,
I've recently starting editing WoW UI and I was wondering if its possible be send/receive data before the character login? For example to make server info frames on login screen.
You can communicate quite a lot of data from the server alert panel but you are not guaranteed to receive this data within a set time frame.
The only other way is through invisible login requests where you scan information from the username field. But this is really hacky and you cannot receive data this way.
Receiving information through the alert panel is receive only as well, and it is not called again until a client restart after being populated.
Your best option is just not to try and do communication from the login screen, why do you need to?