Moves to the previous record in the dataset.
Call Prior to move to the previous record in the dataset, making it the active record. Prior posts any changes to the active record and
Fetches the previous record and makes it the active record. If the dataset is unidirectional, it raises an EDatabaseError exception at this point.
Fetches any additional records required for display, such as those needed to fill out a grid control.
Sets the Bof property to true if the first record in the dataset was already active.
Broadcasts the record change so that data controls and linked detail sets can update.
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