EnableScrollBar function

The EnableScrollBar function enables or disables one or both scroll bar arrows.

Syntax

BOOL EnableScrollBar(
  HWND hWnd,
  UINT wSBflags,
  UINT wArrows
);

Parameters

hWnd

Type: HWND

Handle to a window or a scroll bar control, depending on the value of the wSBflags parameter.

wSBflags

Type: UINT

Specifies the scroll bar type. This parameter can be one of the following values.

Value Meaning
SB_BOTH
Enables or disables the arrows on the horizontal and vertical scroll bars associated with the specified window. The hWnd parameter must be the handle to the window.
SB_CTL
Indicates that the scroll bar is a scroll bar control. The hWnd must be the handle to the scroll bar control.
SB_HORZ
Enables or disables the arrows on the horizontal scroll bar associated with the specified window. The hWnd parameter must be the handle to the window.
SB_VERT
Enables or disables the arrows on the vertical scroll bar associated with the specified window. The hWnd parameter must be the handle to the window.

wArrows

Type: UINT

Specifies whether the scroll bar arrows are enabled or disabled and indicates which arrows are enabled or disabled. This parameter can be one of the following values.

Value Meaning
ESB_DISABLE_BOTH
Disables both arrows on a scroll bar.
ESB_DISABLE_DOWN
Disables the down arrow on a vertical scroll bar.
ESB_DISABLE_LEFT
Disables the left arrow on a horizontal scroll bar.
ESB_DISABLE_LTUP
Disables the left arrow on a horizontal scroll bar or the up arrow of a vertical scroll bar.
ESB_DISABLE_RIGHT
Disables the right arrow on a horizontal scroll bar.
ESB_DISABLE_RTDN
Disables the right arrow on a horizontal scroll bar or the down arrow of a vertical scroll bar.
ESB_DISABLE_UP
Disables the up arrow on a vertical scroll bar.
ESB_ENABLE_BOTH
Enables both arrows on a scroll bar.

Return Value

Type: BOOL

If the arrows are enabled or disabled as specified, the return value is nonzero.

If the arrows are already in the requested state or an error occurs, the return value is zero. To get extended error information, call GetLastError.

Requirements

   
Minimum supported client Windows Vista [desktop apps only]
Minimum supported server Windows Server 2003 [desktop apps only]
Target Platform Windows
Header winuser.h (include Windows.h)
Library User32.lib
DLL User32.dll