I may have found a bug in the SPTreeView control. When you select a node the CSS class declared in the SelectedNodeStyle isn't applied to the node. Other than that it seems to behave correctly.
Sample markup (in a LAYOUTS page)
<wssuc:InputFormControl runat="server" LabelText="Folder:">
<Template_Control>
<SharePoint:SPTreeView id="tvFolder" runat="server" OnLoad="GetFolders" ShowExpandCollapse="False" OnSelectedNodeChanged="RefreshPositions">
<NodeStyle CssClass="ms-vb-user" />
<SelectedNodeStyle CssClass="ms-tvselected" />
<HoverNodeStyle CssClass="ms-tvselected" />
SharePoint:SPTreeView>
Template_Control>
wssuc:InputFormControl>
Because of this it might be better to use the ASP.NET TreeView control. In the above sample the only thing that needs to change is to
