Ok this is the story, for my A-level computing i need to design a database for a delivery company. The deliveries are made in consignments, with each consignment haveing many parcels in it. Each parcel has three sets of dimensions (length, height and breadth) the total of these three dimensions must be less than 300cm. In my form i have a ox for the operator to fill out for each dimension. i have one more calculation box that totals the dimensions.

i can validate the individual dimensions but the total box ignores the vlaidation completely !

thanx in advance http://www.access-programmers.co.uk/ubb/smile.gif