Special Characters

Hello!!!

I know it's a silly question but I'm writing a script on Windows and
when I run it at the prompt the characters like "ç" turns into þ and
"ã" into "Ò" for example. What should I configure in Windows for the
prompt to show the right characters???

Regards

-- 
Henrique
"Não há ninguém que seja tão grande que não possa aprender e nem tão
pequeno que não possa ensinar."
"There's no one that is so great that could not learn nor so small
that could not teach."
"O indivíduo confiante tenta mais, erra mais, aprende mais." - Piaget
"The confident individual try more, err more, learn more." - Piaget