Important : how to create a validation for table field.

Question

Hi all,
I have created a table in which i have date field of format MM/DD i.e char 5.
i want validation that if user creates a entry in date field then if he enters first two digit more then 12 then validation must be their that please enter first 2 digits from 1-12.
similarly for last two digitsi.e it must be from 1-31
so how can i provide this validation.
if u have any confusion in understanding the query please revert.

Answer 1

Declare 3 variables
DD(2) type char
MM(2) type char
Temp(2) type char
Date(5) type char
Get the DD and MM value from your date field
if MM > 12.
    temp = MM.
    MM = DD.
    DD = temp.
endif.
Then concatenate MM & DD into date and save
Hope it helps!
Regards,
Ashok