BCGControlBar Pro for MFC
void CBCGPGridCtrl::SetDragAutoScrollSpeed ( int  nBar,
int  nSteps 
)

Specifies the automatic scrolling speed during grid item(s) dragging.

Parameters
nBarSpecifies the scroll bar orientation. Must be SB_VERT or SB_HORZ.
nStepsSpecifies the scrolling amount. If this value is <= 0, the system setting SPI_GETWHEELSCROLLLINES / SPI_GETWHEELSCROLLCHARS will be used.