Method XbpBrowse():pageUp() Foundation
Moves the browse cursor one page up.
:pageUp() --> self
:pageUp() returns a reference to the XbpBrowse object.
The method :pageUp() moves the record pointer backward the number of data records which are visible in the browse window, and invalidates the browse display. If the first data record is already visible in the browse window, the browse cursor is merely positioned to the first data row. When the browse cursor is already on the first data row and the record pointer also stands on the first record, the browse window remains unchanged and the XbpBrowse object evaluates the code block assigned to the instance variable :hitTopBlock.
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