I believe it works when user click on disabled row, but will not work while navigating with keyboard up/down arrows.
In this case one of the solution is to add code in the Combobox When Event like:
*----------
if this.Value="YourDisabledList"
keyboard '{dnarrow}'
endif
*----------


>>Can I set an item in a combobox that is being used as a dropdown to be disabled? Rowsourcetype is set to value. if the item the value corospondes to is blank in the table I would like the user to see but not be able to pick that item in the combobox. Cant seem to find the right property if there is one and if not does anyone have any ideas?

>Put a backslash before the item to disable