As Craig said, you can't bind a combobox to a logical field. If you need to have a combo (showing Yes/No or something similar) then do NOT bind the field. In the VALID() or InteractiveChange() events store the correct value to the logical field based on the user's choice of combo entries.

HTH
Barbara

>Hi, Dear All,
> When I use a logic field as the combo box control source, it always get out some error message "Error:combo-value data type mismatch. Can't bound the object combo" while init the object combo box in runtime. Is that a bug of VFP and how can avoid it ? Thanks anyway!:)
> BTW I used the VFP 6.0 sp5.