Dennis,

Go over to my website and look at the grid sample I built showing linkmaster vs parameterized views.

I'd suggest you look at using parm-views entirely for the child and grandchild tables the form complication goes down quite a bit. Plus things like the grid vertical scroll thumb is proportionate the the size of the records in the parm-view and not the whole underlying table.

>I need to design order history enquiry form. In the form, it need to inquiry three tables information (Order, Order-item, Delivery-Detail). Each order can have many order-item, and each order-item can also have many delivery detail. I just want to how to create this enquiry form. In this form, it with contain two grids. One is to display the order-item, and the other one is display the delivery-detail. Orderno is the key to seek the order-item, and the orderno, item-no and item-color are the key to seek the delivery-item records.
>I also want to know how to set the childorder, linkmaster, relationexpr in this two grids (grid-orderitem, grid-deliveryitem).
>Waiting for any suggestion.