Currency format

Hi!

I have a character field, which contains numbers like this: 123456.78

I would like to convert them into an another character field (NOT currency) iwth a format like this: 123.456,78

Of course it has to handle the lower and higher numbers also:

123.45 -> 123,45

111222333,44 -> 111.222.333,44

What's the easiest solution for this?

Thank you

Tamá