BCGControlBar Pro for MFC
BOOL CBCGPEditCtrl::ScrollPageDown ( int  fnBar,
BOOL  bRedrawOnScroll 

Scrolls one page down vertically or horizontally.

Nonzero if the function succeeds; otherwise 0.
fnBarSpecifies the vertical or horizontal scroll bars.
bRedrawOnScrollSpecifies whether the edit control should be redrawn if scrolling has occured as a result of this operation.