Zeoslib Portal

I am using a TDBGrid to Browser a TZQuery. The TZQuery.Filtered property is set to TRUE so, that not all Rows are fetched as one. This works perfekt, excep the scrollbar of the DBGrid, which only has 3 position (first, somewhere in the middle, last). As far as I understand this is because it does not know the RecordCount.

But I have already got the RecordCount. Is there a possibility to tell the DBGrid the RecordCount somehow, so that the scrollbar behaves "normaly".

Thanks