Call this member function to set the information that the SCROLLINFO structure maintains about a scroll bar.
The SCROLLINFO structure contains information about a scroll bar, including the minimum and maximum scrolling positions, the page size, and the position of the scroll box (the thumb). See the SCROLLINFO structure topic in the Windows SDK for more information about changing the structure defaults.
The MFC Windows message handlers that indicate scroll-bar position, CWnd::OnHScroll and CWnd::OnVScroll, provide only 16 bits of position data. GetScrollInfo and SetScrollInfo provide 32 bits of scroll-bar position data. Thus, an application can call GetScrollInfo while processing either CWnd::OnHScroll or CWnd::OnVScroll to obtain 32-bit scroll-bar position data.
CWnd::GetScrollInfo enables applications to use 32-bit scroll-bar positions.