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SBM_SETSCROLLINFO Overview  Group

An application sends the SBM_GETSCROLLINFO message to set the parameters of a scroll bar.

SBM_SETSCROLLINFO 

wParam = (WPARAM) fRedraw;              // redraw flag 

lParam = (LPARAM) (LPSCROLLINFO) lpsi;  // scroll bar parameters 

 

Parameters

fRedraw
Value of wParam. Specifies whether the scroll bar is redrawn to reflect the new scroll box position. If this parameter is TRUE, the scroll bar is redrawn. If it is FALSE, the scroll bar is not redrawn.
lpsi
Value of lParam. Points to a SCROLLINFO structure. Before sending the message, 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 a combination of the following values:

Value

Meaning

SIF_DISABLENOSCROLL

Disables the scroll bar instead of removing it, if the scroll barís 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.

Return Values

The return value is the current position of the scroll box.

Remarks

The messages that indicate scroll-bar position, WM_HSCROLL and WM_VSCROLL, provide only 16 bits of position data. However, the SCROLLINFO structure used by SBM_GETSCROLLINFO, SBM_SETSCROLLINFO, GetScrollInfo, and SetScrollInfo provides 32 bits of scroll-bar position data. You can use these messages and functions while processing either the WM_HSCROLL or WM_VSCROLL messages to obtain 32-bit scroll-bar position data.

See Also

GetScrollInfo, SBM_GETSCROLLINFO, SCROLLINFO, SetScrollInfo

See also:


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