Thank you all for the suggestions! Problem solved!

>>A user enters a day in a spinner. They then choose a month from a combobox. They do not enter a year. Is there an
>>easy way to tell if the month/day combination is valid?
>
>You could do:
>

>IF EMPTY(CTOD(STR(month,2)+"/"+STR(day,2)"))
>  * invalid
>ELSE
>  * valid
>ENDIF
>

>You only need the month and day to make a valid date (assumes current year).
>You may have to special checking to handle Feb. 29.
>
>Note that this is SET DATE format specific.