With this button you can initiate a DCC send
session. That means you can send a file to a user by
specifying his\her nickname and the name of the file
you want to send. Once you have done that, select [Send]
and mIRC will send information to the nickname you
specified telling him\her that you want to send a file.
In order for the file transfer to begin he\she has
to accept your send request.
With this button you can initiate a DCC Chat
session. DCC Chat allows you to talk privately by connecting
directly to another client, bypassing the IRC network.
DCC = D
lient). Enter the nickname of the user and select [OK].
that to initiate a DCC Chat the user has to accept
your chat request. If a user replies to a /dcc chat
request by initiating another dcc chat with you then
mIRC treats this as an acceptance of it's own request.