Starts capturing lines and sending them to the specified window. If windowname is omitted, lines are sent to the command editor (assuming capturing is enabled within the editor). Otherwise, the lines are sent to the named window. The window is created if it doesn't exist. If the Capture Commands option is on in the preferences, then commands entered into the command line will also be captured to the window.
C+ example
#C+ temp starts copying all lines received from the MUD to the window named temp.
#nnn