Treeview is most suitable control for my task. But, since I need to fill it with over 15000 records it is very slow. If I decide to add nodes only for first level (3500 records) it is slow again. Code I use is

sele xx
scan
thisform.oletree.add(...)
..
..
sele yy
scan for yy.field1 = xx.field2
thisform.oletree.add(...)
..
..
endscan
endscan

I tried to fill from one table, or to evaluate expression (stored in table) where is stored definition of adding node but always is slow. Maybe treview is not suitable control for bunch of records?

Is there any resonable solution for my problem or is there some other control with similar behavior?

Thanks in advance.