A family of Microsoft relational database management systems designed for ease of use.
Hi,
if the combo box is in the main form you can simply set the link properties of the subform control in the main form, i.e. in design view of the main form click once on the subform and in the property sheet set its properties:
Link Master Fields: [HereTheNameOfYourComboBox]
Link Child Fields: [HereTheNameOfTheFieldInTheSubform]