I'm just starting with RadGridView and trying to figure out how to create a combobox column inside my RadGridView. I've added a column that is of type GridViewComboBoxColumn. I've created a BindingSource that Contains the values for the combobox. I can't figure out how to set the datasource property of the Column to use that BindingSource. Google search says to set the datasource property but when I'm going through the "Open Properties Builder" and I select my combobox column I don't see that property listed under advanced for the column.