It's not like it's banned code, it just was never publicly released. If you want I can show you the code.
Edit: Here
package clCmd {
function NMH_Type::send(%chat) {
%msg=%chat.getValue();
%wrd=firstWord(%msg);
%cmd="clCmd"@getSubStr(%wrd,1,strLen(%wrd));
if(getSubStr(%msg,0,1)$="/"&&isFunction(%cmd)) {
call(%cmd,getWord(%msg,1),getWord(%msg,2),getWord(%msg,3),getWord(%msg,4),getWord(%msg,5));
commandToServer('stopTalking');
canvas.popdialog(newMessageHud);
%chat.setValue("");
}
Parent::send(%chat);
}
};
activatePackage(clCmd);
Just pop that into a client.cs, add a description and away you go.