描述
这个SCROLLINFO结构包含要设置的滚动条参数SetScrollInfo函数（或SBM_SETSCROLLINFO消息）或检索到GetScrollInfo函数（或SBM_GETSCROLLINFO消息）.
FreeBASIC 语法
TYPE SCROLLINFO cbSize AS UINT fMask AS UINT nMin AS LONG nMax AS LONG nPage AS UINT nPos AS LONG nTrackPos AS LONG END TYPE |
成员
cbSize
Specifies the size, in bytes, of this structure. The caller must set this to SIZEOF(SCROLLINFO).
fMask
Specifies the scroll bar parameters to set or retrieve. This member can be a combination of the following values:
SIF_ALL
Combination of SIF_PAGE, SIF_POS, SIF_RANGE, and SIF_TRACKPOS.
SIF_DISABLENOSCROLL
This value is used only when setting a scroll bar's parameters. If the scroll bar's new parameters make the scroll bar unnecessary, disable the scroll bar instead of removing it.
SIF_PAGE
The nPage member contains the page size for a proportional scroll bar.
SIF_POS
The nPos member contains the scroll box position, which is not updated while the user drags the scroll box.
SIF_RANGE
The nMin and nMax members contain the minimum and maximum values for the scrolling range.
SIF_TRACKPOS
The nTrackPos member contains the current position of the scroll box while the user is dragging it.
nMin
Specifies the minimum scrolling position.
nMax
Specifies the maximum scrolling position.
nPage
Specifies the page size. A scroll bar uses this value to determine the appropriate size of the proportional scroll box.
nPos
Specifies the position of the scroll box.
nTrackPos
Specifies the immediate position of a scroll box that the user is dragging. An application can retrieve this value while processing the SB_THUMBTRACK request code. An application cannot set the immediate scroll position; the SetScrollInfo function ignores this member.
引用文件
WinUser.bi