Added in 1.5
/ctcp <nick/#channel> <ctcp>
Requests <ctcp> from <nick/#channel>.
See also on CTCP, on CTCPREPLY, /ctcpreply.
Parameters
<nick/#channel> - The nick or #channel to request ctcp from.
<ctcp> - The ctcp to request.
Example
;Version everyone in #adiirc /ctcp #AdiIRC VERSION