ListBox.BoundColumn Property (Access)
When you make a selection from a list box, the BoundColumn property tells Microsoft Access which column's values to use as the value of the control. If the control is bound to a field, the value in the column specified by the BoundColumn property is stored in the field named in the ControlSource property. Read/write Long.
The BoundColumn property uses the following settings.
The ListIndex property value, rather than the column value, is stored in the current record. The ListIndex property value of the first row is 0, the second row is 1, and so on. Microsoft Access sets the ListIndex property when an item is selected from a list box or the list box portion of a combo box. Setting the BoundColumn property to 0 and using the ListIndex property value of the control might be useful if, for example, you are only interested in storing a sequence of numbers.
1 or greater
(Default is 1) The value in the specified column becomes the control's value. If the control is bound to a field, then this setting is stored in that field in the current record. The BoundColumn property can't be set to a value larger than the setting of the ColumnCount property.
For table fields , you can set this property on the Lookup tab in the Field Properties section of table Design view for fields with the DisplayControl property set to Combo Box or List Box.
In Visual Basic, set the BoundColumn property by using a number or a numeric expression equal to a value from 0 to the setting of the ColumnCount property.
If the bound column is not the same as the leftmost visible column in the control (or if you set the BoundColumn property to 0), the LimitToList property is set to Yes.
Microsoft Access uses zero-based numbers to refer to columns in the Column property. That is, the first column is referenced by using the expression Column(0); the second column is referenced by using the expression Column(1); and so on. However, the BoundColumn property uses 1-based numbers to refer to the columns. This means that if the BoundColumn property is set to 1, you could access the value stored in that column by using the expression Column(0).
If the AutoExpand property is set to Yes, Microsoft Access automatically fills in a value in the text box portion of the combo box that matches a value in the combo box list as you type.