VBFlexGrid Control (Replacement of the MSFlexGrid control)

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So like in the reader mode? (AllowReaderMode = True and click or hold down middle mouse button)
There the scroll is faster/slower depedent on the "distance" to the anchor..

It doesn't seem to have anything to do with reader mode. You can try selecting 5,000 rows from 30,000 grid rows with your mouse and see how much time it takes.