>>If I'm running this code, the result is incorrect, because VFP cannot handle that large numbers.
>>What would be a workaround?
>>

>>CREATE CURSOR cuTest (test c(20))
>>FOR lnNr = 1 TO 7000
>>	INSERT INTO cutest VALUES ("123456789012345")
>>endfor
>>SUM VAL(test) TO lntest
>>

>
>

>CREATE CURSOR cuTest (test c(20))
>FOR lnNr = 1 TO 7000
>    INSERT INTO cutest VALUES ("123456789012345")
>endfor
>SELECT  SUM(VAL(test)) FROM cuTest
>

>But I'm not sure of the result is correct :-)

No, the result is 864197523086459400. It is not correct, I test it by incrementing one number by 1 and see if the result also increments by one, but it doesn't.