There is a way.

You'll need a DLL, and a "trick" posted earlier.

As was said previously, $mid($rawmsg,$calc($pos($rawmsg,$+($chr(32),:),1) +2)) will contain the FULL content of a message, spaces and all. However, echoing it was always a problem. A DLL created by Saturn specifically for mIRC 6.16 allows you to echo it easily! ( URL here )

Although well documented for SENDING text, receiving required some searching, I found the best way to be the following:

Code:
on *:text:#:{
$dll(spaces.dll, echo, -t $chan $+(<,$nick,>) $mid($rawmsg,$calc($pos($rawmsg,$+($chr(32),:),1) +2)) 
halt
}


and it will echo EXACTLY what was said, spaces and all.

To SEND all your text, as is perfectly documented in the README, use the following:

Code:
  on *:INPUT:#:{
    if ((/* iswm $1) && (!$ctrlenter)) return
    ;gets the full, unmodified $1- from your editbox
    var %input = $dll(spaces.dll, input, )
    $dll(spaces.dll, send, PRIVMSG $target : $+ %input)
    $dll(spaces.dll, echo, -aitc own $+(<,$me,>) %input)
    halt
  }



And as i'm sure you noticed, the DLL accepts all the flags echo accepts. From there you just need to edit the above for any type of input and text (except DCC chats since they're not supported by the DLL yet).


I hope this helps somebody because it solved all my problems and took me forever to find.