Converting RTF portugues file

[moscatm]

Hi all,
Are there any way to implement for portugues special caracter like ç, â ô õ ?
the word "RELAÇÃO" for examplo your code print as rela'e7'e3o any help to fix it?
if you know where I can add this characters in the code. only let me know where

Here um example

Format($document); file_put_contents('rtf.html', $r); //echo $r; ?>