Vertically scrolls through the active sheet by percentage or by row number
[C++]
static int VScroll(
   double position,
   bool row_logical = false
);
Position specifies the row you want to scroll to.
Row_logical is a logical value specifying how the function scrolls.
Zero if the function has been called successfully; non-zero
            if the function could not be called.
            See Error codes for a list
            of return values.
See the Microsoft Excel on-line Help for full details about
            this function.
Header: xlfuncs.h