Microsoft Access 302 Advanced Access Development Product Table & Form, Select Product From Combo Box, Column Property, GoToRecord, DLOOKUP, Error Handling, More. 67 Minutes.

Access 302 continues our advanced Access database development with VBA programming. We continue work on our sales and order-entry system.

First we'll make a Product table and form so we can pick from a list of products when making an order. We'll learn how to deal with products that are non-taxable, or perhaps taxed at a different rate than normal (for example, clothes in NY state have a different tax rate than most products).

Next we'll make a combo box to list all of our products so that we can select a product when making an order. We'll put this in the footer section of our Order Details subform.

We will then create a command button that we can click on to get the data out of the combo box and put it up into the order details. You will learn how to use the Column property of a combo box.

You will learn how to move the focus to a new record in VB code, and how to set a field value. You will learn how to get data from multiple columns in the combo box.

As great as combo box columns are, you can't use them for everything. Next you'll learn about a powerful function called DLOOKUP that you can use to retrieve ANY values from ANY tables or queries in your database.

When we're finished with this lesson, we'll have added much more functionality to our order-entry system by allowing the user to select the product from a list of products instead of just typing it into the order.

1. Product Information
Backup Access 301 Database
Create a Product Table
Non Taxable Products
Sales Tax Override
Put ProductID in Order Details table

2. Product Combo Box
Create a Product Combo
Remember the value for later use
Put Combo in OrderDetails Footer
Command Button to Add Product
Get Data from Combo Box Columns
Combo.Column() property

3. Get Data From Combo Box
ProductCombo.Column()
Move to a new record in VB code
DoCmd.GoToRecord
Accessing data from multiple columns

4. DLOOKUP
What is DLOOKUP
When should you use DLOOKUP
DLOOKUP to get values from tables
Me.Refresh
DLOOKUP Order Tax Rate from CustomerT
DIM a variable in VB
Basic Error Handling
On Error Resume Next
 

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