The Value tab in the Combo Box Builder specifies where to get return values and where to store them. The other Combo Box Builder tabs are: List Items tab, Style tab, and Layout tab.
When you choose OK, the builder closes, applying the property settings from every tab to the control.
Return the Value From
Specifies the column whose value is stored to a table field when the user selects a combo box item. This option corresponds to the BoundColumn property.
Field Name
Specifies a table or view field in which to store the value specified in the Return the Value From box. By default, the list includes fields from tables in the data environment. Choose the dialog button to display the Open dialog box so you can select another table. This option corresponds to the ControlSource property.
For example, if you fill the combo box with a list of 50 states, when the user chooses a state, you could write it to the STATE field of an address table.