Creates a new hidden column and appends it to the collection.
A BandedGridColumn object representing the new column.
Use the Add method to add a new column with default settings to the end of the collection. Note that the new column has no caption, is not bound to any data source field and its other settings aren't specified. So, you need to customize the method's return object to provide appropriate settings for the column.
To make the column visible, use the GridColumn.VisibleIndex property.
Please refer to the Columns topic for related information.