DataTable.FeedBackDuringScroll = bValue

The setting for bValue are:

Setting Description
True DataTable refreshes its data whenever the thumb is moved on the vertical scrollbar.
False DataTable waits until the thumb on the vertical scrollbar is released to refresh data.

If FeedBackDuringScroll is TRUE, scrolling to the bottom of very large data sets can be difficult, especially in VM mode, as DataTable will continually fetch new records while the thumb is being moved. This property has no effect for line up, line down, page up or page down scroll actions - they are always immediate.

P/S/ у меня закончился триал, может кто поможет?