BCGControlBar Pro for MFC
void CBCGPRibbonSlider::SetZoomButtons ( BOOL  bSet = TRUE,
LPCTSTR  lpszZoomInTooltip = NULL,
LPCTSTR  lpszZoomOutTooltip = NULL 
)

Tells whether slider has "zoom" buttons.

When left button is clicked, the current position is decremented by one. When right button is clicked, the current position is incremented by one.

Parameters
bSetSpecifies whether to display (TRUE), or hide (FALSE) "zoom" buttons.
lpszZoomInTooltipSpecifies "Zoom In" button tooltip.
lpszZoomOutTooltipSpecifies "Zoom Out" button tooltip.