Well, you simply set the value of the field to which the drop down is bound to the correct value. So, if your drop down list has the values of 'no', 'yes', and 'maybe' manually entered as the choices, and it is bound to the 'option' field, by setting the value of the option field to 'no', 'no' would be the selected item from the drop down. Remember, you are dealing with case sensitive comparisons, so 'No' will not equal 'no'.