Registry editor type design(treeview control??)

My requirements are very similar to the design of Regsitry Editor.

I have one main node "Queries".

Sub nodes are database1, database2 and database3

No sub nodes after that.

When user clicks on database1, new working area should be there,which will list results of some queries. Same with db2 and db3.

I need new area to display something depending upon user selection of sub nodes.

Any help,pointers, starters

Thanks