Dan,

>Yes, cUnitOfMeasure and cReportUnit are both CHAR(3). This is a windows app.

Gotcha...missed that point <s>. In that case, I recommend setting a breakpoint in mmComboBox.OnBindData() to see what's happening. You can also check out the MM .NET Windows Forms sample app...the Customer Orders Form has a few combo boxes that work against the Northwind database.

Best Regards,