My brain must not be firing on all cylinders this morning...I have a 2 column combo box tied to a table and want to show the either both (perferred) or just the second column after the user selects from the popup list. As it is right now, it only shows the first field. What am I missing?

When the combo is "closed", its DisplayValue is always taken from the first column of its RowSOurce. If you want both columns displayed when the combo is closed, you meed to concatenate them into the first column of the combo's RowSOurce.