The contents of the LVB are not affected by this function. Typically, the presentation driver responds to this call by calling GreCharRect. An alternative approach is to use the horizontal and vertical movement fields to define a new source rectangle in the DC and to use GreBitblt to transfer the bits. When new information is revealed from the LVB as a result of the scroll, the handling routine calls GreCharRect to update the display. This approach provides considerable performance advantages for devices that support GreBitblt