PMFJI,
but are you sure that field is a date field?
that looks like something a numeric field with input mask would allow.

>It is letting me enter values like 66/44/9999 which is an invalid date.
>
>>>I have as a "Save" button. In the click method of the button I want to be be sure a field is a valid date, i.e. nn/mm/yyyy where nn is a valid month, mm is a valid day and yyyy is a valid year.
>>>
>>>The format of the field is KD.
>>>
>>>How can I do that?
>>
>>If you set format as D, then the field would be automatically validated.
>>
>>Otherwise you may look at the special date class I developed:
>>Re: Replacing VFP's Invalid Date message Thread #1131737 Message #1131791