>I have a TEST field which contains something like 1,2,5,18,23,32,33,34.
>
>I would like to compare a value within this field value.
>
>For example, I would like to do something like
>
>IF INLIST(TEST,'23')
> ...
>ENDIF
>
>But, this is not working. How can I process this validation?

You can compare this way:
IF '23' $ TEST