Hi Blom. Thanks for your reply.
and Sorry for my slow reply.
I have to give you more information again.
>IIF((substr(field),1,1),'X',2,1)+
>IIF((substr(field),2,1),'X',2,1)+
>IIF((substr(field),3,1),'X',2,1)
it's nice idea. but I can't.
because The Japanese language has too many kind of 2byte...