Plugin creation info?

[Christos Liaskos]

Dear LyX development team,

First of all, many thanks for your hard work! I am an enthusiastic user 
of LyX since 2009.

I would like to create a custom plugin. (The goal is to provide 
generalized text autocompletion, depending on the context).

I have searched for information about developing plugins in general, but 
I can't find much.

Can you direct me to some info on how to develop plugins?

Many thanks,

Christos

PS. Apologies if you got more than one copy of this message.