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Earlier in this chapter, you saw that one way to deal with the need to display lots of information on one form is to use a multiple-page form (frmContactsPages, shown in Figure 10-2 and Figure 10-3). Another way to organize the information on a single form is to use the tab control to provide what look like multiple folder tabs that reveal different information depending on the tab chosen much like the Options dialog box in Microsoft Access (choose Options from the Tools menu) provides View, General, Edit/Find, Keyboard, Datasheet, Forms/Reports, Pages, Advanced, International, Error Checking, Spelling, and Tables/Queries tabs. In the LawTrack Contacts database, a contact has basic contact information and notes, as well as related companies, contact events, and products. Open the frmContacts form to see how the tab control displays only one of these pieces of information at a time, as shown in Figure 10-11 on the next page. You can click the Companies tab (as shown in Figure 10-12 on the next page) or any of the other tabs to see additional information. Note that there s no programming required to implement tab selection and data display. See 13, Advanced Form Design, for details about how to use the tab control.

10

A zone is an administrative entity you create on a DNS server to represent a discrete portion of the namespace. Administrators typically divide the DNS namespace into zones to store them on different servers and to delegate their administration to different people. Zones always consist of entire domains or subdomains. You can create a zone that contains multiple domains, as long as those domains are contiguous in the DNS namespace. For example, you can create a zone containing a parent domain and its child, because they are directly connected, but you cannot create a zone containing two child domains without their common parent, because the two children are not directly connected (see Figure 4-7).

10

10

Figure 4-7

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Before you examine the scenarios and considerations for mobile phone applications, use Figure 1 to frame the main areas of concern. All of these areas are covered in this chapter, with additional information available throughout the subsequent chapters and appendices of this guide.

You can divide the DNS namespace into multiple zones and host them on a single DNS server if you want to, although there is usually no persuasive reason to do so. The DNS server in Windows Server 2003 can support as many as 200,000 zones on a single server, although it is hard to imagine what scenario would require this many. In most cases, an administrator creates multiple zones on a server and then delegates most of them to other servers, which then become responsible for hosting them.

10 10

Figure 10-11.

Every zone consists of a zone database, which contains the resource records for the domains in that zone. The DNS server in Windows Server 2003 supports three zone

10 10

Figure 10-12.

4-34

10 10

You saw the contact picture in the frmContactsPages form earlier. This picture is stored in a field in the tblContacts table using Microsoft s ActiveX technology. The logo in the top part of the main switchboard form in the LawTrack Contacts database, on the other hand, is a picture that Access has stored as part of the form. The control that you use to display a picture or any other ActiveX object is called an object frame. A bound object frame control is used to display an ActiveX object that is stored in a field in a table such as the picture on frmContactsPages or frmContacts. When you edit the object in a bound object frame, you re updating the field in the table. An unbound object frame control is used to display an object that is not stored in a table. Access stores the object with the form definition, and you cannot edit it in Form view.

4

Using Forms When you include a bound object frame control on a form and bind the control to an OLE object field in the database, you can edit that object by selecting it and then right-clicking the picture to open the shortcut menu. On the Bitmap Image Object submenu, choose Edit, as shown in Figure 10-13. Note If you use an unbound object frame on a form, you can edit the contents of the frame only when you have the form in Design view.

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