Hello Kannan,

 The picture you placed in the post isn't loading for me so I built out all the parts of the "headers" for the UltraGrid to show the tooltips for each part.  There are numerous ways to accomplish this task... first I did it with a DrawFilter, then I did it with a CreationFilter and finally I went the normal route and did it without any filters... here is my final solution to setting tooltips on items:

using Infragistics.Win;

using Infragistics.Win.UltraWinGrid;

namespace WinGridRowHeaderTooltips

{

    public partial class Form1 : Form

    {

        public Form1()

        {

            InitializeComponent();

        }

        private MyTooltip myRowSelectorHeaderTooltip;

        private void Form1_Load(object sender, EventArgs e)

        {

            this.ultraGrid1.DataSource = LoadGrid();

            myRowSelectorHeaderTooltip = new MyTooltip();

        }

        private DataTable LoadGrid()

        {

            DataTable dt = new DataTable();

            dt.Columns.Add("Col0", typeof(int));

            dt.Columns.Add("Col1", typeof(string));

            dt.Columns.Add("Col2", typeof(bool));

            DataRow dr;

            for (int i = 0; i < 20; i++)

            {

                dr = dt.NewRow();

                dr[0] = i;

                dr[1] = "Value is: " + i.ToString();

                dr[2] = i % 2;

                dt.Rows.Add(dr);

            }

            return dt;

        }

        private void ultraGrid1_InitializeLayout(object sender, Infragistics.Win.UltraWinGrid.InitializeLayoutEventArgs e)

        {

            e.Layout.Override.RowSelectors = Infragistics.Win.DefaultableBoolean.True;

            e.Layout.Override.RowSelectorHeaderStyle = Infragistics.Win.UltraWinGrid.RowSelectorHeaderStyle.SeparateElement;

            // column header tooltip settings

            e.Layout.Bands[0].Columns[0].Header.ToolTipText = "tooltip text for column header of col 0";

            // row selector tooltip settings

            e.Layout.Rows[0].ToolTipText = "tooltip text for row 0";

            e.Layout.Rows[2].ToolTipText = "tooltip text for row 2";

            e.Layout.Override.TipStyleHeader = Infragistics.Win.UltraWinGrid.TipStyle.Show;

        }

        private void ultraGrid1_MouseEnterElement(object sender, UIElementEventArgs e)

        {

            if (e.Element is RowSelectorHeaderUIElement)

            {

                e.Element.ToolTipItem = myRowSelectorHeaderTooltip;

            }

        }

    }

    class MyTooltip : IToolTipItem

    {

        #region IToolTipItem Members

            public ToolTipInfo GetToolTipInfo(Point mousePosition, UIElement element, UIElement previousToolTipElement, ToolTipInfo toolTipInfoDefault)

            {

                toolTipInfoDefault.ToolTipText = "Row Selector Header UI Element ToolTip Text!";

                return toolTipInfoDefault;

            }

    }