Thank you again.

I have another issue if you don't mind as following:-

How to search a treeview to change the checked box status on a multi level treeview example:-
A
--A1
---A1A1
--A1A2
--A2
---A2A1
--A2A2
B

WHEN I CLICK THE A NODE HOW TO CHECK OUT ALL THE NODES BELONG TO THAT NODE.

Best Regards