Header Checkbox for all Columns

        private void RadForm1_Load(object sender, EventArgs e)
        { 
            this.productsTableAdapter.Fill(this.nwindDataSet.Products);
            this.radGridView1.BestFitColumns();

            this.radGridView1.CellFormatting+=radGridView1_CellFormatting;
            this.radGridView1.Columns.RemoveAt(1);

            CustomColumn customColumn = new CustomColumn();
            customColumn.Width = 100;
            customColumn.Enabled = true;
            customColumn.FieldName = "ProductName";
            this.radGridView1.Columns.Insert(1,customColumn);
        }

        private void radGridView1_CellFormatting(object sender, CellFormattingEventArgs e)
        {
            if (e.Column.FieldName=="ProductName" && e.Row is GridViewDataRowInfo)
            {
                e.CellElement.Enabled = ((CustomColumn)e.Column).Enabled;
            }
        }

        public class CustomColumn : GridViewTextBoxColumn
        {
            public override Type GetCellType(GridViewRowInfo row)
            {
                if (row is GridViewTableHeaderRowInfo)
                {
                    return typeof(CustomHeaderCell);
                }
                return base.GetCellType(row);
            }

            public bool Enabled { get; set; }
        }

        public class CustomHeaderCell : GridHeaderCellElement
        { 
            public CustomHeaderCell(GridViewColumn column, GridRowElement row) : base(column, row)
            {
            }

            protected override Type ThemeEffectiveType
            {
                get
                {
                    return typeof(GridHeaderCellElement);
                }
            }
            public override bool IsCompatible(GridViewColumn data, object context)
            {
                return data is CustomColumn;
            }

            RadCheckBoxElement checkBox = new RadCheckBoxElement();

            protected override void CreateChildElements()
            {
                base.CreateChildElements();
                this.checkBox.CheckStateChanged += checkBox_CheckStateChanged;
                checkBox.StretchHorizontally = true;
                this.Children.Add(checkBox);
            }

            private void checkBox_CheckStateChanged(object sender, EventArgs e)
            {
                CustomColumn column = this.ColumnInfo as CustomColumn;
                if (column != null)
                {
                    column.Enabled = this.checkBox.Checked;
                    this.GridControl.MasterTemplate.Refresh();
                }
            }

            protected override void SetContentCore(object value)
            {
                base.SetContentCore(value);
                this.DrawText = false;
                this.checkBox.CheckStateChanged -= checkBox_CheckStateChanged;
                CustomColumn column = this.ColumnInfo as CustomColumn;
                if (column != null)
                {
                    this.checkBox.Text = column.FieldName;
                    this.checkBox.Checked = column.Enabled ;
                }

                this.checkBox.CheckStateChanged += checkBox_CheckStateChanged;
            }
        }