Displaying messaging based on a value returned by calculating difference between two dates.

Question

2 dates are input by user date of birth and date when a vaccines is given. then 2 dates are subtracted and result displayed in a text box. I am able to do accomplish these tasks, what I am not do is to display a conditional message based on the number of days returned. I have a criteria which is as under
if days > 0 & < 29
message should say " ok"
else if days > 28
message should say " not ok"
Is there a way to post a code? i can post the code here if needed

Answer 1

anybody?