Hi, thanks for the reply.  My problem is resolved now.  Basing on the column index, i am selecting the property of node expansion as None.

Thanks & regards,

Sriram

The following code sample demonstrates how to use the UIElement.ElementFromPoint method to hit test for a particular element, in this case an UltraTreeNodeCellUIElement. Once you have a reference to the associated UltraTreeNodeColumn, you can decide whether to expand the node (set UltraTreeNode.Expanded to true) or "display a colorpalette":

private void ultraTree1_MouseDoubleClick(object sender, MouseEventArgs e)
{
    UltraTree tree = sender as UltraTree;
    UIElement controlElement = tree.UIElement;
    UIElement elementAtPoint = controlElement != null ? controlElement.ElementFromPoint( e.Location ) : null;

    UltraTreeNodeCellUIElement cellElement = null;
    while ( elementAtPoint != null )
    {
        cellElement = elementAtPoint as UltraTreeNodeCellUIElement;
        if ( cellElement != null )
        {
            UltraTreeNodeColumn column = cellElement.Column;
            UltraTreeNode node = cellElement.Node;
        }

        elementAtPoint = elementAtPoint.Parent;
    }
}

Hi Mike,

This property totally arrests the double click action on the node.  But the requirement is when a parent node is double clicked which is in first column it should expand and the corresponding cell value in column 7 when double clicked should display a colorpalette.  It means double click should behave in different way when clicked on firstcell and 7th cell for the same node (the tree is in outlook express mode).

Regards,

Sriram.