> For test I'm using DbGrid because it is easy to use than DeveloperExpress grid.

If you are trying things out, use an IB_Query and an
IB_Grid, and see what happens. I dropped all other girds
over a year ago and find that the IB_Grid does everthing
that I want - and more.

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Lester Caine
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L.S.Caine Electronic Services