Where can I find documentation on Mysql embedded ?
First point to note is that MySQL withdrew support to embedded server many years ago.
But still with FWH we can still use embedded server and FWH comes with all the required dll/libs and FWH MySQL/maria built-in library supports it.
To start with:
https://forums.fivetechsupport.com/viewtopic.php?f=3&t=33798
and
mysqlmbd.prg and mysql_emb.prg in the samples folder.