on isValidAccount (mailAddress,password) {
	local(folder, f, username);
	folder = file.folderFromPath ( frontier.getProgramPath () );
	f = folder + "DLLs\\krb5-passwd-frontier.dll";
	username = string.nthField(mailAddress,"@",1);
	if dll.call(f,"CheckPassword",username,password) == 0 {
		return (true)};
	return (false)}