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Access UI

Welcome!

The Northwind 2.0 Developer Edition Template expands on the concepts of the Northwind 2.0 Starter edition, with a more complete data model and more sophisticated features. To learn more, select any of the following topics. 

About the Template

The Northwind 2.0 Developer Edition template showcases major features of Access; it is not designed to run a company nor show you how to build such an application. 

Northwind is a fictitious trading company whose customers are independent grocery stores.

  • Customers call in orders or place them over the internet. In this template, Internet orders are a mockup.

  • Northwind invoices, ships, collects payments, and closes orders. Purchase orders and inventory management are also included in this edition.

Sample data in the template will help you started quickly. 

How to Navigate

Home Ribbon

This template implements navigation using a custom Home ribbon.

Access UI

The left side of the custom Home ribbon contains Northwind application menu navigation.

  • MRU

    MRU = Most Recently Used. This ribbon menu item contains a combo box that is refreshed when an order or a purchase order is added or deleted. This enables the current user to quickly revisit their most recently added orders and purchase orders.

    Access UI

Visit Home > Help Topics > Northwind Features to learn how Northwind 2.0 Developer Edition implements this concept.

  • Orders

  • Maintenance

  • Reports

The right side contains a group of Help Topics:

  • Learn displays this “Welcome” panel.

  • Northwind Features displays a list of features implemented in this template, with navigation tips to view the features’ implementation in the application, and links to Online and in-application Help topics for further exploration.

  • About Northwind displays a very brief history of this template’s conception and development.

  • In addition to these ribbon buttons, many forms have a Help button  Access UI which opens a form-specific help page.

“Develop” Ribbon

Common development tools are grouped here. For a production environment, you might want to make this invisible.

Access UI

Northwind Features

Northwind 2.0 Developer edition includes a feature matrix accessible from the custom Home ribbon Northwind Features button. It contains a list of notable concepts implemented in this version. Each concept topic outlines how you can view an example of it within the Northwind 2.0 Developer template, as well as handy links to learn more about the topic:

  • Click for On-Line Help opens a Web page addressing the topic.

  • Click for in-App Help opens the access application’s internal Help library to the topic.

Multiple Form Instances

By default, Access forms can be instantiated only once. In this template, Northwind Orders and Purchase Orders forms (frmOrderDetails and frmPurchaseOrderDetails) can be instantiated multiple times concurrently. In these forms, follow the  Access UI for a deeper dive into how this is accomplished.

Cascading Combo Boxes

Refer to the Orders form for a method of implementing cascading combo boxes where a Product Categories combobox leads to a Products combobox with only the products for the selected category.

Validating Required Fields

This edition features the VBA function ValidateForm() to highlight required form fields that are empty. For an example, try creating an Order without completing fields Customer and Tax Status. You can further investigate how this was accomplished using the Access UI on the Order screen.

“Lazy Loading” Subforms

Sometimes referred to as “late binding,” lazy loading in a tab control delays loading a tab’s subform contents until the tab is selected. By default, Access loads subforms before loading the form itself. Late binding can improve form performance (loading speed).

See the Product Detail form.

Street Address Map Link

The Company Detail form (frmCompanyDetail) features a Map button that opens the default Web browser to a map of the company’s address. Northwind 2.0 Developer implements this using Microsoft Bing maps, but could use any Web-based map site, such as Google Maps or MapQuest.

Show Filter

Company List and Company Detail forms also demonstrate a means to allow users to view a form’s current filters.

Access UI

Workflows

Both Orders and Purchase Orders implement very simple workflows. These demonstrate a means for controlling the sequence of data updates required to enforce business rules for moving an order from one status to the next.

Reports

Report Fall Catalog - demonstrates a number of more advanced report development topics

  • Multiple sections (Introduction, TOC, Categories, Order form)

  • TOC and pagination

  • Resulting report is a publisher-quality catalog

Monthly Sales By Employee – The report can be filtered at runtime in Report View.

Database Design

Northwind has a simple but correct Relational Database Design.

Tables hold specific information about Northwind's business.

Fields in the tables have specific properties set to make them required or to enforce a certain data type (for example, numeric, date, and yes/no).

Relations between tables enforce business rules and ensure data consistency (for example, an order must be for an existing customer).

To explore Northwind's database design, press F11 to open the Navigation Pane which displays tables and other objects, or choose Develop > Relationships in the ribbon.

Access UI
 

To see the full-size database design image click here

database design thumbnail image

Programming and Visual Basic for Applications (VBA)

This edition features more extensive implementation using VBA instead of macros.

Examining the VBA modules, you may find examples of alternate or Equivalent Syntax. This is included to help you recognize different syntax that accomplishes exactly or approximately the same result.

Programming facilitates application flow (for example, Opening the next form) or enforces business rules (for example, you cannot update an Order status to “Closed” without first receiving payment for it).

Northwind Developer uses different examples of Programming to show Access capabilities:

  • Expressions in the Employees table create the FullNameFNLN and FullNameLNFN fields. An expression field in a table can be used elsewhere, for example, to show the employee's full name in the Access main window title.

    Access UI

    Access UI

  • In Northwind 2.0 Developer Edition, macros are replaced with VBA procedures. To view the VBA editor, press Alt+F11.

By default, Access creates macros when you use Wizards, such as when dropping a button on a form in design view. Access can convert macros to VBA for you: In form Design view, Design > Tools > Convert Form’s Macros to Visual Basic.

Access UI

To explore form programming, open the form in Design view, then select Form Design > Property Sheet to inspect the properties of the selected object. Most of the code is accessed from the Events tab of the property sheet, as shown below.

Access UI

Additional Documentation

Most Northwind forms contain a special help link denoted with the symbol:  Access UI

This symbol will link contextually to Microsoft web pages devoted to all things Northwind, featuring detailed discussions on the Northwind application form objects, their showcased functionality, and how it was accomplished.

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