>Its ok. I got it.
>
>ALLTRIM(STR(VAL("0000000001201212345"),12,0))

not implement an example:

? ALLTRIM(STR(VAL("0000001111201212345"),12,0))

X="0000001111201212345"
? RIGHT(X,LEN(LTRIM(chrtran(X,"0"," "))))