The following code sample demonstrates how to show a tooltip for an UltraListViewColumnHeaderUIElement using the UltraToolTipManager:

private UltraToolTipManager toolTipManager = null;
private UltraToolTipInfo toolTipInfo = null;

private void Form1_Load(object sender, EventArgs e)
{
    this.listView.MainColumn.Text = "Name";
    this.listView.View = UltraListViewStyle.Details;

    int itemCount = 100;
    UltraListViewItem[ items = new UltraListViewItem[itemCount];
    for ( int i = 0; i < itemCount; i ++ )
    {
        items = new UltraListViewItem();
        items.Value = string.Format("Item {0}", i);
    }

    this.listView.Items.AddRange( items );

    this.listView.MouseEnterElement += new UIElementEventHandler(this.listView_MouseEnterElement);
    this.listView.MouseLeaveElement += new UIElementEventHandler(this.listView_MouseLeaveElement);

}

private void listView_MouseEnterElement(object sender, UIElementEventArgs e)
{
    UltraListView listView = sender as UltraListView;

    //  Create the UltraToolTipInfo if it is null
    if ( this.toolTipInfo == null )
    {
        this.toolTipInfo = new UltraToolTipInfo();
        this.toolTipInfo.ToolTipTitle = "UltraListView";
    }
    //  Create the UltraToolTipManager if it is null, and associate
    //  it with the UltraListView and this form
    if ( this.toolTipManager == null )
    {
        this.toolTipManager = new UltraToolTipManager(this.components);
        this.toolTipManager.ContainingControl = this;
        this.toolTipManager.SetUltraToolTip( listView, this.toolTipInfo );
    }

    //  If the cursor is positioned over an UltraListViewColumnHeaderUIElement...
    UltraListViewColumnHeaderUIElement headerElement = e.Element as UltraListViewColumnHeaderUIElement;           
    if ( headerElement != null )
    {
        //  Get the column; check for null because it will be if this is
        //  the "dummy" column header, i.e., the one that is shown when
        //  the actual columns don't fill the entire width of the control.
        UltraListViewColumnBase column = headerElement.Column;
        if ( column != null )
        {
            //  Set the ToolTipText and show the tooltip
            this.toolTipInfo.ToolTipText = column.TextResolved;

            Rectangle toolTipRect = listView.RectangleToScreen(headerElement.Rect);
            Point toolTipLocation = new Point( toolTipRect.Right, toolTipRect.Top );
            this.toolTipManager.ShowToolTip( this.listView, toolTipLocation );
        }
    }
}

private void listView_MouseLeaveElement(object sender, UIElementEventArgs e)
{
    //  Hide the tooltip when the cursor exits the bounds of an UltraListViewColumnHeaderUIElement
    if ( e.Element is UltraListViewColumnHeaderUIElement &&
         this.toolTipManager != null )
        this.toolTipManager.HideToolTip();
}