You now have asked the same question how many times? Three, four?
Nobody ever answered,  probably because nobody even knows what DDE is.
A quick googling gives me the impression that it's Windows/Microsoft
specific. Combine these two things and the answer is most likely no.

So please stop asking.

> Hi!
> Does Squeak support DDE-server comunication?
> I have browsed through classes but havent found anything.
> If there is support for it please share on how to.....
>
> Many thanks in advance!
> Marcus