Check whether this chat SteamID is a Steam lobby.
Check whether this SteamID is valid (according to Steam's rules)
Backports TypeChars to Type
Render this SteamID into Steam2 textual format
Render this SteamID into Steam3 textual format
Render this SteamID into 64-bit numeric format
Create an individual SteamID in the public universe given an accountid
The user's account ID
Check whether this chat SteamID is tied to a Steam group.