Latin and other special charaters coversation to HTML code

I am facing a situation in which i want that fck editor return html codes for æ ø & å these and other special characters. It works fine and return the desired html when FCK.EditMode=0. But if FCK.EditMode=1 which means text area it returns the same characters. I have seen the FCK editor code which uses ConvertToDataFormat function to convert the special characters for EditMode=0 but i am not sure how to use this function for EditMode=1 which is a plain textarea.

Any help on this is very appreciated.

Thanks
Umair