Hi Ignacio,

NTreeList control you can select the whole row which is represented by NTreeListNode.
Therefore you can get the selected node(s), not node's subitems.

You can obtain the selected node by SelectedNodes property.

Here is a small example:

//Filling NTreeList with some data.

NTreeListColumn column0 = new NTreeListColumn();
NTreeListColumn column1 = new NTreeListColumn();

nTreeList1.Columns.Add(column0);
nTreeList1.Columns.Add(column1);

for (int i = 0; i < 5; i++)
{
    NTreeListNode node = new NTreeListNode();
    NTreeListNodeStringSubItem item0 = new NTreeListNodeStringSubItem("Item 0" + i.ToString());
    item0.Column = column0;

    NTreeListNodeStringSubItem item1 = new NTreeListNodeStringSubItem("Item 1" + i.ToString());
    item1.Column = column1;

    node.SubItems.Add(item0);
    node.SubItems.Add(item1);

    nTreeList1.Nodes.Add(node);
}

After select some nodes you can get them as follows:

Best Regards,
Nevron Support Team