<p class="Paragraph">If you insert a combo box or a list box in a document, an AutoPilot starts automatically.<a name="end"/> This AutoPilot allows you to interactively specify which information is shown.</p>
<p class="Paragraph">You can use the <help:link Id="65904" xmlns:help="http://openoffice.org/2000/help"><span class="T1">AutoPilot on/off</span></help:link> icon to keep the AutoPilot from starting automatically.</p>
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<p class="Paragraph">The AutoPilots for combo boxes and list boxes differ from one another in their final step. This has to do with the nature of control fields:</p>
<p class="Paragraph"><a name="listenfelder"/><help:key-word value="forms; list boxes" tag="kw65956_1" xmlns:help="http://openoffice.org/2000/help"/>List Boxes</p>
<p class="Paragraph">In the case of a list box, the user selects one entry from a list of entries. These entries are saved in a database table and cannot be modified via the list box.</p>
<p class="Paragraph">As a general rule, the database table that contains the list entries that are visible in the form is not the table on which the form is based. Thus the list boxes of a given form work by using references, i.e. references to the visible list entries are located in the form table (values table) and are also entered as such in the values table if the user selects an entry from the list and saves it. Via reference values, list boxes can display data from a table linked to the current form table. Thus the <span class="T1">List Box AutoPilot</span> allows two tables of a database to be linked, so that the control field can display a detailed list of a database field that is located in a different table from the one to which the form refers.</p>
<p class="Paragraph">In the other tables the required field is searched for by using the field names (ControlSource) and then the fields will be completed accordingly. If the field name is not found the list will remain empty. When list fields contain linked columns the first column of the other table will be used without a query being shown first.</p>
<p class="Paragraph">If an article table contains, for example, the number of a supplier, the list box can use the 'supplier number' link to display the name of the supplier from the supplier table. On the <span class="T1">Field links</span> page the AutoPilot will ask you about all the settings required for this link.</p>
<p class="Paragraph">In the case of combo boxes, users can select one entry from the list entries or enter text themselves. The entries, which are offered as a list from which users may select, may originate from any database table. The entries that users select or enter so that they can be saved can be saved either in the form only or in a database. If they are saved in a database, they will be written to the database table on which the form is based.</p>
<p class="Paragraph">Combo boxes can display the data of any table. A direct link between the current form table and the table whose values are to be displayed in the combo box (list table) is not required. Combo boxes do not work with references. If the user enters or selects a value and saves it, the value actually displayed will be entered in the form table. As there is no link between the form table and the list table, the <span class="T1">Field Link</span> table does not appear here.</p>
<p class="Paragraph">In the case of a list box, you select entries from the list, and these are saved in the list table. In the case of a combo box, you can add additional text that can be written to the current database table of the form (values table) and stored there as desired. For this function, the <span class="T1">Combo Box AutoPilot</span> has the <span class="T1">Data Processing</span> page as the last page, whereas in the case of list boxes this page does not exist. Here you can enter whether and where text that has been entered is to be saved in the values table.</p>
