extern void DDScrollBuffer_ScrollTo(int X, int Y);
extern void DDScrollBuffer_ScrollTowards(int X, int Y, double Step);
extern void DDScrollBuffer_SoftScrollTo(int X, int Y, long TimeMS, int FPS);
extern void DDScrollBuffer_ScrollTo(int X, int Y);
extern void DDScrollBuffer_ScrollTowards(int X, int Y, double Step);
extern void DDScrollBuffer_SoftScrollTo(int X, int Y, long TimeMS, int FPS);