描述
这个SCROLLBARINFO包含滚动条信息的结构.
FreeBASIC 语法
TYPE SCROLLBARINFO cbSize AS DWORD rcScrollBar AS RECT dxyLineButton AS LONG xyThumbTop AS LONG xyThumbBottom AS LONG reserved AS LONG rgstate (0 to (5 + 1) - 1)) AS DWORD END TYPE |
成员
cbSize
Specifies the size, in bytes, of the structure. Before calling the GetScrollBarInfo function, set cbSize to SIZEOF(SCROLLBARINFO).
rcScrollBar
Coordinates of the scroll bar as specified in a RECT structure.
dxyLineButton
Height or width of the thumb.
xyThumbTop
Position of the top or left of the thumb.
xyThumbBottom
Position of the bottom or right of the thumb.
reserved
Reserved.
rgstate
An array of DWORD elements. Each element indicates the state of a scroll bar component. The following values show the scroll bar component that corresponds to each array index.
Index |
Scroll bar component |
零 |
滚动条本身. |
一 |
顶部或右箭头按钮. |
二 |
页面上或页右区域. |
三 |
滚动盒（拇指）. |
四 |
页面向下或页左区域. |
五 |
底部或左箭头按钮. |
The DWORD element for each scroll bar component can include a combination of the following bit flags.
STATE_SYSTEM_INVISIBLE
For the scroll bar itself, indicates the specified vertical or horizontal scroll bar does not exist. For the page up or page down regions, indicates the thumb is positioned such that the region does not exist.
STATE_SYSTEM_OFFSCREEN
For the scroll bar itself, indicates the window is sized such that the specified vertical or horizontal scroll bar is not currently displayed.
STATE_SYSTEM_PRESSED
The arrow button or page region is pressed.
STATE_SYSTEM_UNAVAILABLE
The component is disabled.
引用文件
WinUser.bi