You are missing the ColumnManagerRow.
ColumnManagerRow headerRow = new ColumnManagerRow();
gridControl1.FixedHeaderRows.Add( headerRow );
A useful tip to learn how to use the grid (or any control for that matter) is to do what you want in the designer, then look at the code that is generated, and simply reproduce the same in your application.
Imported from legacy forums. Posted by André (had 955 views)