Are you having trouble retrieving the store index or displaying the information in the CB, or both.

One thing you need to know is a DGV comboBox column does not have a SelectedIndex or SelectedValue property that you can set. You must set the dgv.row(someRow).Cells(somecolumn).Value = "something"

Here a good link, http://stackoverflow.com/questions/2...ridview-vb-net