Computed columns? numeric to text conversion?

I need to have or simulate a computed column in ISQL. I have two integer columns and I need to concatenate them into a third column. Any suggestions? Also is there any way to have a one to many set up in FORMS? i.e. Can I display an order header and then have a list of line items displayed below? I can't work out from reading the manual how to get a form that will display this sort of thing! e.g. Order number Customer number Customer addresss Line item 1 Line item 2 Line item n Thanks, Kate