BCGControlBar Pro for MFC
void CBCGPSliderCtrl::SetReversedOrder ( UINT  nReversedOrder = BCGP_SLIDER_REVERSED_VERTICAL,
BOOL  bRedraw = TRUE 
)

Specifies whether slider's ticks have a reversed order.

Parameters
nReversedOrderCombination of the following flags: BCGP_SLIDER_REVERSED_VERTICAL and BCGP_SLIDER_REVERSED_HORIZONTAL or 0.
bRedrawSpecifies whether a control should be redrawn.