Question : How to copy field data to anotehr field

Ok.  I know this has to be simple and maybe I'm just tired from piddling with Access all day long but for the life of me I can't think of how to do this:

I just need to be able to copy address, city, state, and zip to the same fields under a co-applicant when a check box is activated.

Help?

Answer : How to copy field data to anotehr field

private sub checkbox0_click()
if me.checkbox0=true then
    me.coappaddress=me.address
   ' etc...

else

end if

end sub