SCROLLBARINFO structure

The SCROLLBARINFO structure contains scroll bar information.

Syntax

typedef struct tagSCROLLBARINFO {
  DWORD cbSize;
  RECT  rcScrollBar;
  int   dxyLineButton;
  int   xyThumbTop;
  int   xyThumbBottom;
  int   reserved;
  DWORD rgstate[CCHILDREN_SCROLLBAR+1];
} SCROLLBARINFO, *PSCROLLBARINFO, *LPSCROLLBARINFO;

Members

cbSize

Type: DWORD

Specifies the size, in bytes, of the structure. Before calling the GetScrollBarInfo function, set cbSize to sizeof(SCROLLBARINFO).

rcScrollBar

Type: RECT

Coordinates of the scroll bar as specified in a RECT structure.

dxyLineButton

Type: int

Height or width of the thumb.

xyThumbTop

Type: int

Position of the top or left of the thumb.

xyThumbBottom

Type: int

Position of the bottom or right of the thumb.

reserved

Type: int

Reserved.

rgstate

Type: DWORD[CCHILDREN_SCROLLBAR+1]

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
0	The scroll bar itself.
1	The top or right arrow button.
2	The page up or page right region.
3	The scroll box (thumb).
4	The page down or page left region.
5	The bottom or left arrow button.

 

The DWORD element for each scroll bar component can include a combination of the following bit flags.

Value	Meaning
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.

 

Requirements

See also

Reference

GetScrollBarInfo

Conceptual

Scroll Bars

Other Resources

RECT

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Build date: 10/27/2012