hello, i'd like to know how can i change the format of a textbox from mm/dd/yyyy 10:00:00 PM to dd/mm/yyyy 22:00:00?

I've used in my main program the next code:

set century on
set hour to 24
set date dmy

but it doesn't work becuase in the form shows the format mm/dd/yyyy 10:00:00 PM.
Thanks for the help