VFP has EMPTY() function for that.

>>Hah? As long as SET EXACT is Off comparing any character expression to the empty string on the right would return .T.
>
>A more reliable way to check for an empty string, regardless of the setting of EXACT, is:
>

>*   IF LEN(ALLTRIM(lcMyVariable)) = 0
    IF <b>EMPTY</b>(lcMyVariable)
>        * Process empty value
>    ENDIF
>