SetScrollInfo Function--------------------------------------------------------------------------------The SetScrollInfo function sets the parameters of a scroll bar, including the minimum and maximum scrolling positions, the page size, and the position of the scroll box (thumb). The function also redraws the scroll bar, if requested.Syntaxint SetScrollInfo( HWND hwnd, int fnBar, LPCSCROLLINFO lpsi, BOOL fRedraw ); Parametershwnd [in] Handle to a scroll bar control or a window with a standard scroll bar, depending on the value of the fnBar parameter. fnBar [in] Specifies the type of scroll bar for which to set parameters. This parameter can be one of the following values. SB_CTL Sets the parameters of a scroll bar control. The hwnd parameter must be the handle to the scroll bar control. SB_HORZ Sets the parameters of the window's standard horizontal scroll bar. SB_VERT Sets the parameters of the window's standard vertical scroll bar. lpsi [in] Pointer to a SCROLLINFO structure. Before calling SetScrollInfo, set the cbSize member of the structure to sizeof(SCROLLINFO), set the fMask member to indicate the parameters to set, and specify the new parameter values in the appropriate members. The fMask member can be one or more of the following values.SIF_DISABLENOSCROLL Disables the scroll bar instead of removing it, if the scroll bar's new parameters make the scroll bar unnecessary. SIF_PAGE Sets the scroll page to the value specified in the nPage member of the SCROLLINFO structure pointed to by lpsi. SIF_POS Sets the scroll position to the value specified in the nPos member of the SCROLLINFO structure pointed to by lpsi. SIF_RANGE Sets the scroll range to the value specified in the nMin and nMax members of the SCROLLINFO structure pointed to by lpsi. fRedraw [in] Specifies whether the scroll bar is redrawn to reflect the changes to the scroll bar. If this parameter is TRUE, the scroll bar is redrawn, otherwise, it is not redrawn. Return ValueThe return value is the current position of the scroll box.
int fnBar,
LPCSCROLLINFO lpsi,
BOOL fRedraw
);
Parametershwnd
[in] Handle to a scroll bar control or a window with a standard scroll bar, depending on the value of the fnBar parameter.
fnBar
[in] Specifies the type of scroll bar for which to set parameters. This parameter can be one of the following values.
SB_CTL
Sets the parameters of a scroll bar control. The hwnd parameter must be the handle to the scroll bar control.
SB_HORZ
Sets the parameters of the window's standard horizontal scroll bar.
SB_VERT
Sets the parameters of the window's standard vertical scroll bar.
lpsi
[in] Pointer to a SCROLLINFO structure. Before calling SetScrollInfo, set the cbSize member of the structure to sizeof(SCROLLINFO), set the fMask member to indicate the parameters to set, and specify the new parameter values in the appropriate members.
The fMask member can be one or more of the following values.SIF_DISABLENOSCROLL
Disables the scroll bar instead of removing it, if the scroll bar's new parameters make the scroll bar unnecessary.
SIF_PAGE
Sets the scroll page to the value specified in the nPage member of the SCROLLINFO structure pointed to by lpsi.
SIF_POS
Sets the scroll position to the value specified in the nPos member of the SCROLLINFO structure pointed to by lpsi.
SIF_RANGE
Sets the scroll range to the value specified in the nMin and nMax members of the SCROLLINFO structure pointed to by lpsi.
fRedraw
[in] Specifies whether the scroll bar is redrawn to reflect the changes to the scroll bar. If this parameter is TRUE, the scroll bar is redrawn, otherwise, it is not redrawn.
Return ValueThe return value is the current position of the scroll box.