Ah, ok, then we likely are taking about a classic invoice, or orders type
screen.
The solution here is to use a sub-form. And, to allow the user to enter many
values, then likely a sub-form in continues mode is the solution.
Take a look at the following screen shots, and note a few that are similar
to what you need.
http://www.members.shaw.ca/AlbertKallal/Articles/Grid.htm
So, likely we would have a few columns in this sub-form.
The first combo could be the customer name. However, if you have to enter a
BUNCH for a given customer, or they belong as a group to a particular
customer order, then likely you need a main form where you bring up the
customer, and then a sub-form where you enter the things sold, price etc
into the sub-form. (two forms = two tables. So, the sub-form is the means by
which you send data to another related table).
If the data entry is not fixed around first finding a particular customer,
but you just need to enter the data, then you still need a continues form,
but likely not a master + child form to group things by a particular
customer.
Regardless of how you need to group this data entry problem, the details
data should be in a continues form.
You would have
Customer units Sold item Unit
Price Salesperson
abc 10 Apples
Joe
def 5 Water melons
Albert
etc. etc.
So, to enter the data as a grid, the first column would be a combo box
(search by customer name..but stores the cust id).
Now, for the item combo, that combo can also be 3 columns
id Descripton unitPrice
3 Apples .3
55 Water mellons .4
So, you can in the after update event of the item comb box place the value
of the unit print into the unit Price.
me!UnitPrice = me.itemCombo.column(2)
The end result of this whole process is that you don't need to write code to
send the data to that other table, but in fact simply has a sub-form that
lets you ENTER the data....
This approach is a LOT less work.
You should probably take a look at the northwind sample that ships with
ms-access.
(you can find this sample under help->sample databases at least that were
it is in a2003).