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