Hallo Frank
 FM> The vertical scroll bar in a RID only seems to know 3 positions -
 FM> top, middle and bottom. It would be nice if properly indicated how
 FM> far into the data set you were (and even nicer if by its size it
 FM> showed the proportion of records currently visible, as some
 FM> applications do). 
 FM> Anybody got any clues?
I made a component that does just that and a lot more. The inevitable 
downside however is that you need to do your browsing using TTable.MoveBy 
excusively. You cannot ever do a Seek or FindKey for there's no way telling 
where you end up. You need to keep track of a virtual record number. Good 
thing MoveBy is extremely fast, a table with 10000 records, each containing 4 
memo's, is still handled with acceptable performance on a common machine.
I dropped the dynamic scroll thumb, after messing about with it for a couple 
of days. It appeared to be impossible 'to make ends meet', dragging the thumb 
all the way down would not bring up the last record or the last record showed 
before the thumb was all the way down. So I used a conventional thumb for the 
vertical bar. Works rather nicely.
Before I made my component (which currently is restricted to viewing 
capability) I thought those guys at Borland had taken the easy way out making 
TDBGrid. Now I understand why the scrollbar works the way it does. They are 
not stupid after all.
Groeten, Martin.
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