Hello JP,

Thank you for submitting your question on the Infragistics Forums.  Yes, it is possible to set only the parent Band and not the child Bands to AutoSize.  After the WinGrid is bound to a DataSource, by looping through the parent Band columns collection and calling the PerformAutoResize for each, the parent Band will auto size not effecting the child Bands columns.

The following code snippet demonstrates how to use the PerformAutoResize for the parent Band columns after setting the AllowColSizing property to Free:

            this.ultraGrid1.DisplayLayout.Override.AllowColSizing = AllowColSizing.Free;

            foreach (UltraGridColumn col in this.ultraGrid1.DisplayLayout.Bands[0].Columns)
            {
                col.PerformAutoResize();
            }

Please let me know if you need further assistance.