I was looking for an application that logs your Steam conversation and I found one. It is called Chat Logger++ 1.2
"What this utility does in a nutshell
Takes your average steam conversation...
and stores it!
The application runs mostly in the background, with a taskbar icon for interaction.
However, the logging process itself is in your control:
You can customize the log format to your own likings.
Limitations (Steam chat works with the latest version, but is buggy at the moment)
This doesn't currently work for group chats. The reasoning behind it is due to the nature of the interfaces that Steam itself uses. It uses a collection of internal interfaces for group chats, but these interfaces are subject to change during any future steam update, and it could break the functionality of the logger."
Download Link:
https://bitbucket.org/VoiDeD/open-steamworks/downloadsMake sure to get Chat Logger++ 1.2.rar, as the other versions break with the recent steam updates.