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EnableScrollBar function

Applies to: desktop apps only

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

Syntax

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

Parameters

hWnd [in]

Type: HWND

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

wSBflags [in]

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 [in]

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 2000 Professional
Minimum supported server	Windows 2000 Server
Header	Winuser.h (include Windows.h)
Library	User32.lib
DLL	User32.dll

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Build date: 3/6/2012

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FAQ

C# syntax

[DllImport("user32.dll", CharSet=CharSet.Auto, SetLastError=true, ExactSpelling=true)]
public static extern bool EnableScrollBar(HandleRef hWnd, int nBar, int value);

History

4/25/2009
dmex

vb.net syntax

<DllImport("user32.dll", CharSet:=CharSet.Auto, SetLastError:=True, ExactSpelling:=True)> Public Shared Function EnableScrollBar(ByVal hWnd As HandleRef, ByVal nBar As Integer, ByVal value As Integer) As Boolean
End Function

History

4/25/2009
dmex