public event PreVScrollEventHandler PePreVScroll;
This event has no arguments.
Fired before vertical scroll bar action is taken.
Set PeUserInterface.Scrollbar.SBCode to -1 to cancel scroll bar action.
Set PeUserInterface.Scrollbar.SBCode = LineUp or LineDown and PeUserInterface.Scrollbar.SBPos as needed to alter scroll positioning.
See Also: PePreHScroll
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