Treeview Node Depth

[noyan]

I got a treeview control which shows company organization, for instance
+CEO
         +Finance Departmen
         +Human Resource Manager
                +Human resource chief
                        +human resource departmen employees
         +Community Services

but when I created treeview it shows like +CEO we have to expand it to see below nodes, I want to set treeview node depth so we can see other departmen under CEO. How can I set node depth of treeview so some of them  come already expanded.
Thank you in advance

[Søren Hartig]

if you want to expand all

RadTreeView1.ExpandAllNodes();