Updating Report control in virtual mode

Hi
I nave Report control in my application that should display tens of thousands of rows.
I read those rows from data base , so it takes time to process them.
Ive implemented functionality that processes the records from DB by bunches of 1000 records and adds them to report control asynchronously.
Every time bunch of records processed i add it to underlying storage, call to SetVirtualMode with new number of rows and call to Populate to show new rows.
Everything works but every time i call Populate , Vertical scroll bar jumps back to first row of the list.
The whole idea of my mechanism is to make it possible for user to observe rows that already processed , while rest of rows being added.And its very hard to do when report control always jumps back to first row.
Is there some way to avoid this jump back to first row behavior?
Thanks

alexshemesh wrote: [...] Everything works but every time i call Populate , Vertical scroll bar jumps back to first row of the list. The whole idea of my mechanism is to make it possible for user to observe rows that already processed , while rest of rows being added.And its very hard to do when report control always jumps back to first row. [...]