The /closechats command is used to close all inactive DCC chat windows; Inactive windows are the ones in which the DCC connection was closed but the window remained open.
This command was removed (Replaced by /close command).
;Close all inactive dcc chat windows /closechats
Added: mIRC v4.52
Added On: 06/07/1996
Removed: mIRC v4.6
Note: Individual switches were not taken into consideration.