scrollBy method
Causes the window to scroll relative to the current scrolled position by the specified x- and y-pixel offset.
HRESULT retVal = object.scrollBy(x, y);
x [in]
Type: longlong that specifies the horizontal scroll offset, in pixels. Positive values scroll the window right, and negative values scroll it left.
y [in]
Type: longlong that specifies the vertical scroll offset, in pixels. Positive values scroll the window down, and negative values scroll it up.
Type: HRESULT
If this method succeeds, it returns S_OK. Otherwise, it returns an HRESULT error code.
There are no standards that apply here.