How to send a message on Facebook?

There seem to be a few different plugins or SDKs that can be used to try and share messages to your Facebook wall as a general status, but is there a way to send a message to a specified friend on Facebook from a game?

I understand that this is normally used for coding assistance but after some quick research I can’t even see any starting points as everything is focused on status updates.

Read the links below:

Facebook SDK for Unity Reference

The above link leads to two other links below out of which you will need one: