using variable from data manager

Hi,

Inside data manager I see there is a prompt for user to input something before send to server to run package.

example:

PROMPT(RADIOBUTTON,%CHECKLCK%,"Select whether to check work status settings when running logic.",1,{"Yes, check for work status settings before running logic","No, do not check work status settings"},{"1","0"})

from this prompt i can know user selection of radio button value (1 0R 0) will store in %CHECKLCK% and send to server.

my question is can i use %CHECKLCK% as variable in my logic script because i may need run something like

time=next(%CHECKLCK%)

I do try this ,but i just cannot get the %CHECKLCK% value....i always get NULL value.

Thanks..