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In the property sheet for each text box, combo box, and list box are three properties that you can set to determine how Access displays the data in the form. These properties are Format, Decimal Places, and Input Mask, as shown in Figure 12-21.

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For details on the Input Mask property, see 4, Creating Your Database and Tables. For details on dynamically changing format properties (also called conditional formatting) based on the value currently displayed, see 13, Advanced Form Design. 12

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Account Lockout Threshold Specifies the number of failed logon attempts that causes the Windows operating system to lock out users from future attempts until an administrator resets the account. The default value is zero, which means that users are allowed unlimited failed logon attempts. Enforce User Logon Restrictions Specifies whether the Kerberos Key Distri bution Center (KDC) should validate every request for a session ticket against the user rights policy of the requesting user s account. By default, this policy is enabled. Maximum Lifetime For Service Ticket Specifies the amount of time that cli ents can use a Kerberos session ticket to access a particular service. The default value is 600 minutes. Maximum Lifetime For User Ticket Specifies the maximum amount of time that users can utilize a Kerberos ticket-granting ticket (TGT) before requesting a new one. The default value is ten hours. Maximum Lifetime For User Ticket Renewal Specifies the amount of time during which users can renew a Kerberos TGT. The default value is seven days. Maximum Tolerance For Computer Clock Synchronization Specifies the maximum time difference that Kerberos allows between the client computer and the authentication server. The default value is five minutes.

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Tip Always use four-digit year values I recommended earlier that you change the date display in your regional settings section of Windows Control Panel to display a four-digit year. Although Access adjusts the century digits automatically when you enter two-digit years, you will avoid confusion about the actual value stored after the year 1999 if you always display the full year. All samples you see in this book using the Short Date format show four-digit years because I changed the settings on my machine. If your machine is set to display a two-digit year, you will see a different result everywhere I used the Short Date format.

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Tip Windows account policies have three possible states: enabled, disabled, and unde fined. The difference between disabled and undefined comes into play when multiple Group Policy Objects apply to the same objects and the Windows operating system must resolve policy conflicts. An enabled policy always overrides an undefined instance of the same policy, but a policy that is explicitly disabled might override an enabled instance of the same policy.

Figure 12-21. The list of format settings for the BirthDate control, which uses the Date/ Time data type.

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This default configuration forces users to change their passwords every six weeks, and compels them to use passwords that are not easy to guess. Policies like Minimum Password Age and Enforce Password History prevent the users from working around the password requirements by reusing the same few passwords and repeatedly changing passwords over a short time. If you want to increase the password security on your network, you can modify these defaults by requiring longer passwords and more frequent changes. You can also relax security by disabling some or all of these policies.

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Microsoft Office Access 2003 Inside Out Access copies these properties from the definition of the fields in the underlying table. If you haven t specified a Format property in the field definition, Access sets a default Format property for the control, depending on the datatype of the field bound to the control. In the control s property sheet, you can customize the appearance of the data on your form by selecting a format setting from the Format property s drop-down list or by entering a custom set of formatting characters. The following sections present the format settings and formatting characters available for each data type.

You will find sidebars like this one, which contain related information you might find helpful. Real World sidebars contain specific information gained through the experience of IT professionals just like you.

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