HankakuToZenkaku ( aText, aTextLength, (PRUnichar*) aResult.get(), aTextLength, &ol);
HankakuToZenkaku ( aText, aTextLength, aResult.BeginWriting(), aTextLength, &ol);
NS_IMETHODIMP nsHankakuToZenkaku::Change( const PRUnichar* aText, PRInt32 aTextLength, nsString& aResult){  PRInt32 ol;  aResult.SetCapacity(aTextLength);     HankakuToZenkaku ( aText, aTextLength, (PRUnichar*) aResult.get(), aTextLength, &ol);  aResult.SetLength(ol);  return NS_OK;}