Method XbpColumn():scrollDown() Foundation
Scrolls rows in the data area upwards and refreshes the rows at the bottom.
:scrollDown( <nRows>, [<lRepaint>] ) --> nScrolled
The method returns as a numeric value the number of rows that are actually scrolled.
The :scrollDown() method changes the display of the data area by shifting the specified number of rows upwards. The contents of the rows at the top of the data area is overwritten while the rows at the bottom are filled with new values.
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