Added in 1.9.4
$dde(name, topic, [item], [delay])
Returns the value returned by the specified service name, topic, and item, by sending an DDE XTYP_REQUEST.
name - Service name of the DDE service to query.
topic - Topic to query.
item - Item to query. (optional)
delay - Seconds to way before giving up getting a response. (optional, default is 1)
//echo My AdiIRC is $dde(AdiIRC, connected) to $dde(AdiIRC, server)