libpurple IM conversation name

[Zoltán Sólyom]

I got libpurple work in VS so now I'm trying to use it, but I'd like to 
ask for a little assistance.

I can start conversations and users can write me, and both opens a 
window. The callback for the "received-im-msg" signal gets the name of 
the sender, that I pass to purple_conversation_new. The name has a 
hexadecimal looking string after it, but the conversation works 
correctly. If I want to send a message first, I don't know about that 
string, so I just create a conversation with the buddy name. Both work, 
but I need a way to identify conversation windows, and the only thing I 
can use is the name of the conversation/buddy. Is it ok to just throw 
away that hexadecimal string when I check if the conversation names are 
equal? And if that string can be removed, is it the same format in every 
protocol and server? Or maybe this approach is completely wrong?