Positions the cursor on the previous record in the dataset.
Call ibec_ds_Prior to position the cursor on the previous record in the dataset and make it the active record.
function ibec_ds_Prior(Dataset : variant) : variant;
execute ibeblock as begin select * from RDB$FIELDS as dataset MyDataset; ibec_ds_Last(MyDataset); while (not ibec_ds_Bof(MyDataset)) do begin ... ibec_ds_Prior(MyDataset); end ... close dataset MyDataset; end