This thread looks to be a little on the old side and therefore may no longer be relevant. Please see if there is a newer thread on the subject and ensure you're using the most recent build of any software if your question regards a particular product. Otherwise - post away!
We don't support the Devart providers, and we don't currently have a way for users to create their own adapters for such providers.
We'd be interested to know your use case for combining LightSpeed with Devart. Is it that the Devart provider for your database is faster than the 'normal' provider, or are there features of the Devart providers that you want to keep taking advantage of?
Actually, there are several features that the counterpart doesn't have, as you can see in their web site.
You can take for example, dotConnect for MySQL Pro, which is one of the providers we use from such company, and is more cheaper than buying a non-GPL-ed version of MySQL Connector, since we're not going to open up our code.