Pick lists in a combo box could be populated by:
"Yes,No,Don't Know"
code Customer Group
select xgitem from caitem group by xgitem
When a pick list is to be populated by combining multiple sources, separate each source-specs by double semi-colon “;;”. For instance,
"Yes, No, Don't Know";;code Customer Group;;select xgitem from caitem
If you are incorporating a combo box in a menu, you need to replace special characters with their equivalent ascii character-based #char function. For instance, to combine the first two sources, specify
... xgitem=Delivery Option=All=combo="+#char(34)+"Yes,No, Don't Know"+#char(34)+";;code Customer Group)" ...